case study questions for science class 6

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CBSE 6th Standard CBSE all question papers, important notes , study materials , Previuous Year questions, Syllabus and exam patterns. Free 6th Standard CBSE all books and syllabus online. Practice Online test for free in QB365 Study Material. Important keywords, Case Study Questions and Solutions. Updates about latest education news and Scholorships in one place.

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Cbse, ncert and icse solution online, class 6 science case study question, case study question class 6 science (cbse / ncert board).

Class 6 Science Case Study Question and Answer: CBSE / NCERT Board Class 6 Science Case Study Question prepared by expert Science Teacher. Students can learn Case Based Question / Paragraph Type Question for NCERT Class 6 Science.

There are total 16 chapter Food Where Does It Come From, Components of Food, Fibre to Fabric, Sorting Materials Into Groups, Separation of Substances, Changes Around Us, Getting to Know Plants, Body Movements, The Living Organisms and Their Surroundings, Motion and Measurement of Distances, Light Shadows and Reflection, Electricity and Circuits, Fun with Magnets, Water, Air Around Us, Garbage In Garbage Out.

For any problem during learning any Case or any doubts please comment us. We are always ready to help You.

CBSE Class 6 Science Case Study Question

Chapter 1 Food Where Does It come From Case Study Question

Chapter 2 Components of Food Case Study Question

Chapter 3 Fibre to Fabric Case Study Question

Chapter 4 Sorting Materials Into Groups Case Study Question

Chapter 5 Separation of Substances Case Study Question

Chapter 6 Changes Around Us Case Study Question

Chapter 7 Getting to Know Plants Case Study Question

Chapter 8 Body Movements Case Study Question

Chapter 9 The Living Organisms – Characteristics and  Habitats Case Study Question

Chapter 10 Motion and Measurement of Distances Case Study Question

Chapter 11 Light Shadows and Reflection Case Study Question

Chapter 12 Electricity and Circuits Case Study Question

Chapter 13 Fun with Magnets Case Study Question

Chapter 14 Water Case Study Question

Chapter 15 Air Around Us Case Study Question

Chapter 16 Garbage In Garbage Out Case Study Question

What is Case Study Question?

Ans. At case Study there will one paragraph and on the basis of that concept some question will made. Students have to solve that question.

How many marks will have at case based question?

Most of time 5 questions will made from each case. There will 1 or 2 marks for each question.

Important links:

• Lakhmir Singh Class 6 Book Solution
• NCERT Solution Class 6 Science

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Case Study Questions for Class 6 Science Chapter 5 Separation of Substances

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[Download] Case Study Questions for Class 6 Science Chapter 5 Separation of Substances

Here we are providing case study or passage-based questions for class 6 science chapter 5 Separation of Substances.

Case Study/Passage Based Questions

You are asked to add two spoons of solid salt to some liquid water taken in a beaker. On stirring it you find that whole of the salt has disappeared and only liquid can be seen in beaker. 1. After stirring the salt completely disappears and you can see only liquid in the beaker. The liquid in beaker is (a) water (b) solution (c) solute (d) solvent 2 . Which of the following processes will be useful to get salt from this solution? (a) Condensation (b) Evaporation (c) Filtration (d) Sedimentation 3. Which process can you use to get liquid water from the water vapours if you collect them in another container? (a) Sedimentation (b) Condensation (c) Evaporation (d) Filtration

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What is case study question for class 6 science.

Case study or passage-based questions in class 6 Science typically require students to read a given scenario or passage and answer questions based on the information provided. These questions assess students’ comprehension, analytical thinking, and application of scientific concepts. Here is an example of case study or passage-based questions for class 6 Science:

Passage: Rahul conducted an experiment to investigate how different liquids affect the rusting of iron nails. He placed four iron nails in four separate beakers containing water, vinegar, oil, and saltwater. After one week, he observed the nails and recorded his observations.

a) What is the purpose of Rahul’s experiment?

b) Compare and contrast the appearance of the iron nails in each beaker after one week.

Best Ways to Prepare for Case Study Questions

To develop a strong command on class 6 Science case study questions, you can follow these steps:

• Read the textbook and study materials: Familiarize yourself with the concepts and topics covered in your class 6 Science curriculum. Read the textbook thoroughly and take notes on important information.
• Practice analyzing case studies: Look for case studies or passages related to class 6 Science topics. Analyze the given information, identify key details, and understand the context of the situation.
• Develop comprehension skills: Focus on improving your reading comprehension skills. Practice reading passages or articles and try to summarize the main points or extract relevant information. Pay attention to details, vocabulary, and the overall structure of the passage.
• Understand scientific concepts: Ensure that you have a solid understanding of the scientific concepts discussed in class. Review the fundamental principles and theories related to each topic.
• Make connections: Try to connect the information provided in the case study to the concepts you have learned in class. Identify any cause-effect relationships, patterns, or relevant scientific principles that apply to the situation.
• Practice critical thinking: Develop your critical thinking skills by analyzing and evaluating the information given in the case study. Think logically, consider multiple perspectives, and draw conclusions based on the evidence provided.
• Solve practice questions: Look for practice questions or sample case study questions specifically designed for class 6 Science. Solve these questions to apply your knowledge, practice your analytical skills, and familiarize yourself with the format of case study questions.
• Seek clarification: If you come across any challenging concepts or have doubts, don’t hesitate to ask your teacher for clarification. Understanding the underlying principles will help you tackle case study questions effectively.

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Important Questions for CBSE Class 6 Science Chapter 10 - Motion and Measurement of Distances

• Class 6 Important Question
• Chapter 10: Motion And Measurement Of Distances

CBSE Class 6 Science Important Questions Chapter 10 - Motion and Measurement of Distances - Free PDF Download

The CBSE Class 6 Science syllabus is set to create an easy medium to deliver scientific knowledge to the students. The chapters included in this syllabus will introduce the kids to a new world of science where they will learn new fascinating concepts. The 10 th chapter of the Class 6 Science syllabus is about motion and the measurement of distance. Here, the students will need the assistance of Class 6 Science Chapter 10 Important Questions apart from the exercise questions to build their knowledge.

NCERT Solutions Class 6 Science Chapter 10 Important Questions have been framed by the top science teachers of Vedantu with the sole aim to deliver concept-based answers. The students will also find how questions related to this chapter are formed. They can practise answering the questions and follow an accurate method by referring to the solutions. In this way, they will be able to score in the exams by following the Motion and Measurement of Distances Class 6 Important Questions. Let us check what this chapter is all about first and how these questions can benefit a student’s curriculum.

Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. You can download Class 6 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

Overview of Class 6 Science Chapter 10 Important Questions

Chapter 10 of the Class 6 Science syllabus is a significant one because students will be introduced to the concepts of motion, velocity, speed, distance, displacement, and many more. These concepts will not only give them a strong foundation in the topic but will also introduce them to the more complex and advanced concepts that are to be taught in the higher classes. Students can take help from the Motion and Measurement of Distances Class 6 Chapter 10 Important Question to understand the different terms and their implementation in the best way. Students can strengthen their knowledge about specific terms and their descriptions by thoroughly reading the chapter. After completing the chapter, they will have to download the important questions and boost their preparation for the exams.

Solving the important questions for Class 6 Science Chapter 10 will enable students to understand the contents of the chapter in detail. The faculty members at Vedantu have prepared these questions so that students can get proper practice before their exams. The PDF also contains some extra important questions that are most likely to appear in the final exams. Practising these questions will help the students get some additional knowledge about the topics. The learned experts at Vedantu have made sure that students have all the help they need to complete their syllabus.

Download CBSE Class 6 Science Important Questions 2024-25 PDF

Also, check CBSE Class 6 Science Important Questions for other chapters:

Study Important Questions for Class 6 Science Chapter 10 – Motion and Measurement of Distances

Very Short Answer Questions                                                              (1 Mark)

1. The earliest mode of transport on the water was

a) Aeroplane 

b) Hovercraft 

c) Bullock cart 

d) Logs tied together

Ans: d) Logs tied together

2. To fly from one place to another we use

b) Bird 

c) Boats 

d) Batmobile

Ans: a) Aeroplane

3. One of the early measures of distance was

a) Litre 

b) Gram 

c) Paces 

Ans: c) Paces

4. A curved line can be measure using

a) Ruler 

b) string and ruler 

c) measuring cylinder 

Ans: b) String and ruler

5. Hands of the clock show

a) Circular motion 

b) straight motion 

c) Periodic motion 

d) Both a and c

Ans: d) Both a and c

6. Swing shows _______________ motion

a) Circular 

b) Linear 

c) Periodic 

d) none of the above

Ans: c) Periodic 

7. A car moving in a straight line on the road shows _____________ motion.

d) both a and c

Ans: b) linear 

8. Windmill blades show ___________ motion.

9. The yard is a measure of distance between

a) Two hands 

b) the hand and the feet 

c) between the hand and the elbow

d) end of the arm and the chin.

Ans: d) End of the arm and the chin

10. Cubit was a unit of measurement used in

a) Egypt 

b) Ancient India 

c) Rome 

Ans: a) Egypt

11. The fixed quantity of measurement is called

a) Foot 

b) Pound 

c) unit 

Ans: c) unit

12. The system of standard units of measurements is the

a) SI system 

b) fps system 

c) mks system 

d) IUPAC system

Ans: a) SI system

13. The SI unit of length is

a) Millimetre 

b) centimetre 

c)  micrometre 

d)  metre

Ans: c) micrometre

14. \[\mathbf{1}\] metre is equal to

a) \[\mathbf{1000cm}\] 

b) \[\mathbf{1000mm}\]

c) \[\mathbf{100cm}\]

d)  both b and c

Ans: d) Both b and c

15. \[\mathbf{1}\] km is equal to

a) \[\mathbf{1000m}\]

b) \[\mathbf{1000cm}\]

c)  \[\mathbf{1000mm}\]

d)  none of the above

Ans: a) \[\text{1000m}\]

Short Answer Questions                                                                               (3 Marks)

1. Who created the metric system and why?

Ans: In 1790, the French devised the metric system in order to establish a uniform system of measurement. Until then, different people employed various methods. For example, to measure distance, cubits, paces, foot, yards, and other units were used. There was no uniformity in measurement because each item had a different value. Furthermore, the value of each would vary depending on who was measuring. As a result, to assure homogeneity of measurements throughout different countries, regardless of their size and French introduced the metric system to the world.

2. The distance from Meena’s house to the playground is \[20\]paces. If one pace is equal to \[40\,cm\], what is the distance in SI units?

Ans: Given: The distance from Meena’s house to playground \[=\text{ }20\]paces 

$\because 1 pace = 40 cm$

Then, \[20 paces = 20 \times  40\] 

\[\text{= 800 cm}\]

\[\because \text{100 cm = 1 m}\]

Hence, \[\text{800 cm = 8 m}\]

Therefore, the distance from Meena’s house to the playground in SI units is \[\text{8m}\].

3. Keith requires \[5.6\] yards of cloth to get a suit stitched. What length of cloth does he require in metres if \[1\] yard is \[0.9\] metres?

Ans: Given: Keith requires \[5.6\] yards of cloth

\[\because \text{1 yard = 0}\text{.9 m}\]

Then, \[\text{5}\text{.6 yards = 5}\text{.6  }\!\!\times\!\!\text{  0}\text{.9}\]

\[\text{= 5}\text{.04 m}\]

Therefore, Keith requires \[\text{5}\text{.04 m}\]of cloth.

4. The length of the blackboard in Ajay’s class is \[4.5\] cubit. What is its length in SI units if  $ 1\text{cubit}=\text{ }45.72\text{cm} $ ?

Ans: Given: Length of the blackboard in Ajay’s class \[=\text{ }4.5\text{ cubit}\]

\[\because \text{1cubit = 45}\text{.72 cm}\]

Then, length of the blackboard \[=\text{ }4.5\text{ }\times \text{ }45.72\]

\[=\text{ }205.74\text{ cm}\]

Now, length of the blackboard \[\text{= }\dfrac{\text{205}\text{.74}}{\text{100}}\]\[\text{= 2}\text{.05 m}\]

Therefore, the length of the blackboard in Ajay’s class in SI units \[\text{= 2}\text{.05 m}\].

5. What were some of the early units of measurement of distances?

Ans: A few of the units of measure were:

Finger widths: The thickness or width of a person's fingers were used to

estimate distance. 

Foot length: Distance measured in terms of the length of afoot. 

Cubit: The distance between the elbow and the tips of the fingers. 

Yard: The distance between the end of an outstretched arm and the

Chin is measured in yards. 

 Pace: a pace's or a step's length 

 Angul/multi/forearm length: Measurement based on the size of the

 relevant body components such as a finger, fist, or forearm.

Long Answer Questions                                                                                (5 Marks)

1. What are the different types of motion? Explain with examples.

Ans: Motions can be divided into three categories:

Rectilinear Motion: 

An object moves in a straight path in this sort of motion.

The object's direction may change from time to time, but it always moves in a straight line.

Examples include a car travelling down a straight road, an aeroplane flying, and a ball rolling on the ground.

Circular Motion:

The object moves in a circular motion in this form of motion.

The object moves, but the distance between it and the origin remains constant. 

For example, clock hands, fan blades, windmill blades, and so on.

Periodic Motion:

In this form of motion, an item moves in a sequential manner.

A similar motion is repeated by the object on a regular basis. 

For example, swing movement, drumming, and so on.

2. Compare rectilinear motion with circular motion.

Ans: Comparisons between rectilinear and circular motion is as given below,

3. Classify the following as circular, periodic or rectilinear motion: Playing a mridangam, Carousel, Swing, Speed boat racing ahead, \[\mathbf{100m}\] dash, Shuttlecock during a game of badminton, weather vane, rocking chair, a penalty kick in a game of football, aeroplane during take-off.

Ans: The classification of the motions is as given below,

Motion and Measurement of Distance: Class 6 Science Chapter 10 Important Questions Summary

As mentioned earlier, this chapter is very crucial for the students of Class 6. By understanding all the concepts of this chapter, they will be able to prepare a foundation of knowledge. This knowledge will then be used to learn the advanced concepts in the higher classes such as motion, acceleration, vector quantities, laws of motion, etc. The Important Questions for Class 6 Science Chapter 10 ensure that the students are on the right track. By answering these questions and referring to their solutions, they will be able to get a good hold of the concepts.

The chapter focuses on defining new scientific terms such as motion, distance, etc. The students will learn when a body is said to be in motion. They will also learn how it is decided that a body is moving when compared to a reference frame. On proceeding further in the chapter, the students of Class 6 will learn about the different means of transport used by modern civilization these days. They will also learn how the locomotives and automobiles evolved from prehistoric cartwheels. The Class 6 Science Chapter 10 Important Questions will also be based on what the students are learning here in this chapter.

In the next segment, the students will learn about how measurement is done. They will be fascinated to know that measurement of small lengths is easier but measuring long distances with bigger units is not that easy. By considering the answers to the NCERT Class 6 Science Chapter 10 Important Questions based on this topic, they will learn how a unit of distance and length is the same and is determined. They will also discover how length and distance are measured following traditional ways.

The next segment will teach students how units are determined and distinguished.   They will also understand why a unit is standardized across the world. The concept of units for measuring any physical quantity will start building from this chapter. The conversion of units into smaller or bigger units will also be taught here. Hence, Motion and Measurement of Distances Class 6 Important Questions are quite important for the students to clear their concepts.

In the next section, students will learn how to measure a length using a scale. There are several errors that they have to avoid while measuring a length with the use of a scale. Those errors will be described well in the chapter. The Important Questions for Class 6 Science Chapter 10 will then be used to define the errors in a better way. Students will also learn how to measure a curved line after mastering the measuring technique of a straight line.

In the next segment, the chapter will introduce the students to motion. They will learn the types of motion and how to explain them. They will also learn how distance and time are important to measure motion.

Benefits of Class 6 Motion and Measurement of Distances Important Questions

The experts at Vedantu have explained each and every single principle, process, and term efficiently with the help of proper examples and visual elements. Students can solve the questions and learn more about the chapter in the best way.

After solving the questions, students will also learn more about the concepts such as Parallax, Zero Error Measurements, SI Units of Measurement, and much more.

There are descriptive and calculative questions provided in the PDF file for the students to practise. This way, they will be aware of what to write during the exams so that they can score high marks and perform well.

These questions will also help students complete their revision easily after reading the chapter. They can pick out the most important questions and solve them to gain a better understanding.

Why Should You Download Important Questions on Motion and Measurement of Distances?

The reason for downloading these important questions for Class 6 Science Chapter 10 is to gain more knowledge based on distance, measurement, and motion. This chapter is very crucial for the foundational development of the students. This base of knowledge will then be used to learn new related concepts in the advanced classes. The definition of units for measuring a physical quantity will also be introduced in this chapter.

By referring to the important questions, students will also find out what other question formats exist. It will help them to use the concepts well and answer them confidently.

Download Important Questions for Class 6 Science Chapter 10

Get the free PDF version of Class 6 Science Chapter 10 important questions from Vedantu and prepare your strategy for scoring well during the exams. You can rely on these important questions to get the right guidance and support to understand the topics of the chapter completely.

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FAQs on Important Questions for CBSE Class 6 Science Chapter 10 - Motion and Measurement of Distances

1. Why should you prefer Vedantu for Class 6 Science Chapter 10 important questions?

Vedantu is trusted by the Class 6 students for simplified concept development and high-quality study material. Parents and students prefer Vedantu for NCERT solutions for Class 6 Science Chapter 10 Important Questions and solutions for excellent preparation.

2. Why is this chapter important to study?

This chapter is the first foundation of concepts related to motion, speed, velocity, distance, displacement, etc that will be taught in the higher classes. The Motion and Measurement of Distances Class 6 Important Questions will help students understand the new terms and their implementation in science in the higher classes.

3. Who is credited for creating the metric measurement system?

The French are credited for the creation of the metric measurement system as they established a uniform system of measurement in the year 1760.

4. What can be used for measuring the length of a curved line?

One can measure the length of a curved line with a string and a ruler.

5. Are Class 6 Science Chapter 10 Important Questions really helpful?

Yes, with the help of these important questions, you can improve your answering skills and also enhance your knowledge about the topics from the chapter. 

Chapter wise Important Questions for CBSE Class 6 Science

Cbse study materials.

Class 6 Science Chapter 4 Sorting Materials Into Groups Extra Questions

CBSE Class 6 Science Chapter 4 Sorting Materials Into Groups Extra Questions and Answers is available here. Students can learn and download the PDF of these questions for free. These extra questions and answers are prepared by our expert teachers as per the latest NCERT textbook and guidelines. Learning these extra questions will help you to score excellent marks in the final exams.

Sorting Materials Into Groups Class 6 Science Extra Questions and Answers

Very short answer questions.

Very Short Answer Type Questions -II

1. Why do we need to group materials? Give one reason. Answer: We often group materials for our convenience. It helps to describe their properties.

2. Suggest two bases on which we can group objects. Answer: (i) Material used in making the object, e.g. wood or metal/plastic. (ii) Material of the object is soft or hard, or substance is soluble or insoluble in water.

3. Is a substance which can be compressed soft or hard? Answer: Soft.

4. Select a lustrous material out of the following substances: Answer: Aluminium.

5. Which material is generally used for making pens? Wood, aluminium, plastic, cotton  Answer: Plastic or metal.

6. Is oil soluble in water? Answer: Oil does not dissolve in water so it is insoluble in water but floats on the surface of water.

7. Name two objects which are made from opaque materials. Answer: Wooden doors, blackboard/steel plate.

8. What is common between salt and sand? Answer: Both have mass and are in solid state.

9. List three liquids which are transparent. Answer: Water, alcohol and Acetone/Benzene.

10. Write two substances which are made from leather. Answer: Belt and shoes.

11. Name some substances which are made from plastics. Answer: Toys, plates, cups, buckets, baskets.

12. Which is more hard, sponge or iron? Answer: Iron is harder than sponge.

13. Write two gases which are soluble in water. Answer: Oxygen, Carbon dioxide.

14. Name two gases which are insoluble in water. Answer: Hydrogen and Nitrogen.

15. Name a non-metal that has lustre. Answer: Iodine.

16. Take a small cotton ball and place it in a tumbler/bowl filled with water. Observe it for atleast 10 minutes. Will it float or sink in water and why? Answer: Cotton ball initially floats and then sinks as it absorbs water.

17. Which property of gases helps us in detecting leakage of cooking gas? Answer: The property of diffusion.

18. Name the two gases used by aquatic plants and animals, that are soluble in water. Answer: Oxygen and carbon dioxide are used by animals and aquatic plants.

19. What do you understand by the word ‘classification’? Answer: Classification means grouping the things on the basis of their similarities and dissimilarities.

20. Give an example to explain that one object can be made from different materials. Answer: A plate can be made from steel, glass or plastic.

21. Give one example to explain that different materials are used to make one object. Answer: A bag is made of cloth, plastic and metal.

22. What is a combustible material? Answer: A material which burns on heating at a particular temperature is a combustible material.

Short Type Questions & Answers

1: Name five items which can be made of plastic. Answer: Five items that can be made of plastic are plate, phone, pencil box, pen and chair.

2: Classify these objects as eatables or non eatables. Sugar, apple, ball, pen, pot, grapes, chocolates

Answer: Eatables- sugar, apple, grapes and chocolates. Non eatables-ball, pen and pot

3: Which of these objects are made of wood and which of them are made of paper? Table, chair, newspaper, calendar, bullock cart, notebook

Answer: Objects made of wood- table, chair and bullock cart. Objects made of paper- newspaper, calendar and notebook.

4: Which of the following are shiny objects: Wood, copper wire, paper, chalk, aluminium sheet, steel spoon Answer: Copper wire, aluminium sheet and steel spoon are shiny objects.

5: What is the difference between soft and hard material? Answer: Soft materials are those which can be compressed or scratched easily.

6: Why some materials lose their shine and appear dull?

Answer: Some materials often lose their shine and appear dull because of the action of air and moisture on them.

7: What types of substances are soluble in water? Give example.

Answer: Substances that completely disappear or dissolve in water are soluble in water. For example-salt, sugar etc.

8: What type of substances is called translucent?

Answer: The materials through which objects can be seen but not clearly are known as translucent. For example-oily patch on paper.

9: Classify the following on the basis of float or sink in water: Leaf, key, apple, stone, paper

Answer: Float in water: leaf, paper Sink in water: key, apple and stone.

10: Classify the following as transparent or translucent or opaque material: Cardboard, glass, water, oily paper, wood, stone, metal

Answer: Transparent –glass, water. Translucent-oily paper Opaque-cardboard, wood, stone, metal.

11: What do you mean by the term ‘transparent’?

Answer: Those substances or material, through which things can be seen are called transparent. For example-water, glass etc.

12: Find the odd one out: a. Iron, wood, nail, cotton. b. Sugar, salt, sand, milk c. Copper, wood, aluminium, gold. d. Table, chair, coin, bed

Answer: Cotton, sand, wood, coin.

13: What is the difference between transparent and translucent?

Answer: Those substances or material, through which things can be seen are called transparent. For example-water, glass etc. The materials through which objects can be seen but not clearly are known as translucent. For example-oily patch on paper, butter paper.

14: Why do we need to group materials?

Answer: Dividing materials into groups makes it easy to study their properties. It also helps to observe any pattern in these properties. For example: by placing similar types of objects together, we can locate them easily

15. What are the similarities between iron, copper and aluminium?

Answer: (a) They all have lustre, (b) They are all metals, (c) They are hard.

16. Mention some materials which are made up of paper. Answer: Books, notebooks, newspapers, toys, calendars, etc.

17. Why is water important for our body? Answer: Water can dissolve a large number of substances, so it is needed by the body. It is also major part of our body cells.

18. What is the basis for sorting materials? Answer: Materials are grouped on the basis of similarities or dissimilarities in their properties.

19. What is the reason for grouping materials? Answer: Materials are grouped for our convenience to study their properties and also observe any patterns in these properties.

20. Metals have lustre (shine). Give reason why some metal articles become dull and lose their shine. Answer: Metals when exposed to air react with moisture and gases present in it, thereby forming a dull layer of some other compound on it.

21. Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layers. Explain why.

Answer: The molecules of water do not intermingle (mix) with the molecules of oil. The space between the molecules of water is not taken by oil, so they are immiscible in water.

22. Metals generally occur in solid state and are hard. Name a metal that exists in liquid state and a metal that is soft and can be cut with knife.

Answer: Mercury is a metal that exists in liquid state. Sodium and Potassium are soft metals and can be cut with knife.

25. Name the naturally occurring hardest substance known. Answer: Diamond, it is made up of carbon (non-metal).

24. Why is water called a universal solvent? Answer:  Water dissolves a large number of substances in it. So, it is called universal solvent.

25. Why do we classify materials into different groups?

Answer:  Materials are classified into different groups for the following reasons: i. For the convenience of identifying and locating the different materials. ii. To study their properties and identify common patterns among them.

26. How is density of an object related to its floating or sinking?

Answer:  An object will only float if its density is less than that of the surrounding liquid. It will sink if its density is greater than that of the surrounding liquid.

27. Give one example of each of a combustible liquid, gas and solid.

Answer:  Petrol is a combustible liquid, CNG is a combustible gas and paper is a combustible solid

28. Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?

Answer:  Dissolved oxygen is available for animals and plants for respiration and survival.

29. A solid is put in a bucket of water. It floats just below the surface of the water. What do you think is the density of the object with relation to the density of water?

Answer:  The density of the solid and water is same because solid neither sinks nor floats on water.

30. Water and starch are mixed in a container. What kind of solution will we get?

Answer:  When little amount of starch is added it will dissolve in water. But as the amount of starch increases, the solution starts thickening and forms a suspension.

Long Answer Type Questions

1. ‘Grouping of objects helps the shopkeeper.’ Justify the statement.

Answer:  Proper grouping of objects helps shopkeeper in the following ways: (i) He can locate the required object easily and quickly. (ii) He can easily come to know what stocks are going to finish and he should purchase them for his customers.

2. Describe an experiment to prove that water is transparent.

Answer:  Take a beaker half-filled with clean water. Put a coin in beaker of water. Place the beaker undisturbed for a few minutes where enough light is present. Now, observe the coin immersed in water from the top of the beaker. Are you able to see the coin? You can clearly see the coin immersed in water. This proves that water is a transparent liquid.

3. Write an experiment to show that our palm is translucent.

Answer:  Cover the glass of a torch with your palm at a dark place. Switch on the torch and observe from the other side of palm. We see that the light of torch passes through palm but not clearly. This experiment shows that our palm becomes translucent when a strong beam of light passes through it.

4. Write any four properties of materials. Answer:   (a) Appearance (b) Hardness (c) Solubility (d) Float or sink in water (e) Transparency

5. Why is a tumbler not made with a piece of cloth?

Answer:  We use tumblers made of glass, plastic and metal to keep a liquid. These substances can hold a liquid. A tumbler made of cloth cannot hold a liquid because: (i) Cloth piece is not hard enough to hold liquids and (ii) Cloth piece has very minute pores through which the liquid oozes out.

6. Define soluble, insoluble substances and solubility.

Answer:  The substances which dissolves in water are called soluble substances. For example: Salt, sugar, milk, etc. The substances which do not dissolve in water are called insoluble substances. For example: Chalk powder, sand, stone, etc. The property of substance due to which it dissolves in water is called solubility.

7. Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

Answer:  The given materials can be differentiated on the basis of lustre, hardness, softness, roughness or smoothness.

8. Differentiate among opaque, translucent and transparent materials, giving one example of each.

Answer:  

9. How can materials be grouped together? In what ways do we classify materials?

Answer:  Different materials have different properties. Materials with similar properties can be grouped together. Different types of materials can be grouped based on any of the following properties:

• Transparency
• Conductivity
• Combustibility—Easily burn or not.
• Attraction towards magnet.

10: According to the property of hardness, how would you differentiate whether the object is soft or hard? Justify your answer.

Answer:  When you press different materials with your hands, some of them may be hard to compress while others can be easily compressed. Take a metal key and try to scratch with it, the surface of a piece of wood, aluminium, a piece of stone, a nail, candle, chalk, any other material or object. You can easily scratch some materials, while some cannot be scratched so easily. Materials which can be compressed or scratched easily are called “soft” while some other materials which are difficult to compress are called “hard”. For example, cotton or sponge is soft while iron is hard.

11: How does appearance of objects help us to make sort out of different materials? Show with an activity.

Answer:  Collect small pieces of different materials – paper, cardboard, wood, copper wire, aluminium sheet, chalk. Separate the shiny materials into a group. Now, cuts each material into two pieces and look at the freshly cut surface. Some of these materials are appear shiny. Include these objects also in the group of shiny materials. Instead of cutting, you can rub the surface of material with sand paper to see if it has lustre. Materials that have such lustre are usually metals. Iron, copper, aluminium and gold are examples of metals. Therefore, we can differentiate the materials, according to the lustre.

NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

Sorting Materials Into Groups Class 6 Extra Questions Science Chapter 4

September 11, 2019 by Bhagya

NCERT Extra Questions for Class 6 Science Chapter 4 Sorting Materials Into Groups

Objects around us

Question 1. What do you mean by classification? Answer: Classification is the grouping or sorting together of things possessing similar or dissimilar characteristics or properties.

Question 2. What is the need for classification? Answer: Classification is essential for:

• identification of objects.
• sorting of objects.
• locating things.
• understanding similarities and dissimilarities among objects.
• making the study of objects easy and more meaningful.

Question 3. Why is mercury used in making thermometers? Answer:

• Mercury is liquid at room temperature.
• It is a good conductor of heat.
• Mercury has lustre, so, it is easy to read the temperature shown by the level of mercury.

Question 4. On what basis are the various objects grouped? Answer: The grouping of various objects can be done on the basis of following characters:

• solubility in water
• attraction towards magnet
• conduction of heat
• transparency, etc.

Question 5. Why do we need the grouping of objects? Answer: Grouping the objects helps us to arrange them in a systematic manner. The objects when grouped are easy to handle. When grouped, it is easy to know the properties of an object clearly. Grouping also makes easy to compare two objects.

Question 6. How does the grouping of objects help the shopkeeper? Answer: The grouping of objects in proper way makes it easier to work. When we go to purchase some things, the shopkeeper locates it easily, because there are separate shelves to put various items and similar things are kept at one place. If he randomly places all of these, he would never be able to find them so quickly and easily.

Question 7. Name the various materials from which following things can be made: Shoes, chair, coins, utensils, clothes. Answer:

• Shoes: Leather, rubber, plastic, canvas
• Chair: Wood, metal, plastic, concrete
• Coins: Copper, silver, gold
• Utensils: Iron, copper, aluminium
• Clothes: Cotton, wool, silk, rayon, nylon.

Question 8. Name any four materials that can be used to make school bags. Answer: Cloth (of cotton, jute, nylon, etc.), plastic, metal or alloy.

Question 9. List any three solutions that are used in your home. Answer: Salt solution, sugar solution, cold drinks, lime juice, etc.

Question 10. Why is water important for our body? Answer: Water can dissolve a large number of substances, so it is needed by the body. It is also major part of our body cells.

Activity 2 Table 4.2 lists some common materials. You can also add more materials in Column 1 that are known to you. Now, try and think of everyday objects you know, that are made mainly of these materials, and list them in Column 2.

Table 4.2: Different types of objects that are made from the same material

Properties of materials

Question 1. List five each opaque and transparent materials. Answer: Opaque materials:

Transparent materials:

• Cellophine plastic, and
• Fibre glass.

Question 2. List five objects that are made from transparent materials. Answer:

• Conical flask,
• Glass jug, and
• Glass doors.

Question 3. List five liquids that are transparent. Answer:

• Hydrochloric acid
• Acetone, and

Question 4 List five objects that are made from an opaque material. Answer:

• Wooden furniture.

Question 5. Why is water called universal solvent? Answer: The property of water to dissolve large number of materials makes it a universal solvent.

Question 6. List three liquids which are miscible in water. Answer:

• glycerine, and
• soft drinks.

Question 7. List three liquids which are immiscible in water. Answer:

• kerosene oil, and

Question 8. State conditions when pure water can lose transparency. Answer: Water on cooling, freezes to form ice which is not transparent.

Question 9. List the following substances as soluble and insoluble in water. Sand, salt, sugar, paint, chilli powder, desi ghee, blotting paper. Answer: Water soluble substances: Salt, sugar. Water insoluble substances: Sand, paint, chilli powder, desi ghee, blotting paper.

Question 10. Show that sugar, common salt and washing soda are soluble while chalk powder, iodine and sand are insoluble in water. Answer: Take six test tubes, fill each of them about half with water. Keep each of them in a test tube stand. Add a pinch of each of six substances in separate test tubes. Shake well and allow to stand for few minutes. Common salt, sugar and washing soda dissolve while iodine, chalk powder and sand do not dissolve.

Question 11. Describe a method to prove that water is a transparent material. Answer: Take a white sheet of paper, one sketch pen, one clean beaker and a small quantity of clean water. Now on white sheet mark a symbol (say “X’). Now put the empty beaker over the marked symbol. We can see it properly. Now put water in the beaker. Observe the same mark. The mark is again visible. This observation proves that water is transparent.

Question 12. Why is a tumbler not made with a piece of cloth? Answer: This is because we generally use a tumbler to keep a liquid. A tumbler made of a piece of cloth cannot be used to keep water. So, a tumbler is made with a material which has a property to hold the liquid.

Question 13. Explain with example rough and smooth surfaces. Answer: Rough surface: Materials which have uneven surface or ridges can be termed as a rough surface, e.g., coal. Smooth surface: Materials which are plain and have an even surface are termed as a smooth surface, e.g., marble.

• Solubility or insolubility
• Float or buoyancy
• Transparency.

Question 14. Name two gases each which are soluble and insoluble in water. « Answer: Gases soluble in water are oxygen and carbon dioxide. Gases insoluble in water are hydrogen and nitrogen.

Question 15. Write any four properties of materials. Answer: Four properties of materials are:

Question 16. What are the similarities between iron, copper, aluminium? Answer:

• They all have lustre.
• They all are metals.
• They are hard.

Activity 3. Collect small pieces of different materials—paper, cardboard, wood, copper wire, aluminium sheet, chalk. Do any of these appear shiny? Now, observe as the teacher cuts each material into two pieces and look at the freshly cut surface (NCERT Fig. 4.3). What do you notice? Does the freshly cut surface of some of these materials appear shiny? Yes. Copper wire.

Table 4.4: Solubility of some common liquids in water

Objective Type Questions

Question 1. Match the following items given in Column A with that in Column B:

Question 2. Fill in the blanks with appropriate words:

• Grouping of things is done for ………….. .
• Classification is done on the basis of some ……………. and ………… .
• A thing can be made of different ……………. .
• Different materials can be used to make ……………. .
• Mustard oil is ……………….. in water.
• A sugar syrup is a ……………….. .
• Blue Vitriol (Neela though) is ……………… in water.
• Sand is ……………. in water.
• Lemon juice is ………………… in water.
• …………………. substances are those through which we can easily see.
• Materials which conduct heat quickly are called …………………….. of heat.
• Iron is a …………… material.
• convenience
• Similarities, differences
• Transparent

Question 3. State whether the statements given below are True or False:

• Grouping is a useful process.
• All objects are made up of same kind of materials.
• Things can be grouped on the basis of their shape and size.
• Different types of materials have different properties.
• Same thing can be made from different materials.
• Things made of gold and aluminium have no lustre.
• Use of a material depends on its properties and the purpose for which it is to be used. ,
• A looking mirror or thing made of metals are smooth to touch.
• All materials can be felt by one or more of our senses.
• The amount of matter in any object is called its weight.
• The materials which do not allow light to pass through them are called opaque,
• The materials which conduct heat very slowly are called non-conductor of heat.

Question 4. Choose the correct option in the following questions:

(i) What makes the basis of sorting materials into groups? (a) Similarities in their properties (b) Differences in their properties (c) Both similarities and differences in their properties (d) All of these Answer: (c) Materials are grouped on the basis of similarities and dissimilarities.

(ii) Which one will show a metallic lustre? (a) Any surface of a metal (b) Freshly cut surface of a metal (c) Freshly cut surface of non-metal (d) Surfaces of all materials Answer: (b) Metals when cut, their freshly cut surface has shining.

(iii) An oily thin paper sheet will be (a) transparent (b) translucent (c) opaque (d) cannot be predicted Answer: (b) Only a part of light passes through it.

(iv) Purpose of sorting material into groups is (a) to rtudy their properties (b) convenience (c) both (a) and (b) (d) inconvenience Answer: (c) Materials are grouped for our convenience and to study their properties.

(v) Which is a set of transparent materials? (a) Glass and air (b) Water and glass (c) Water and air (d ) All of these Answer: (cl) Glass, air and water, all are transparent.

(vi) Choose the opaque object from the following: (a) Charcoal (b) Air (c) Glass (d) Water Answer: (a) Except charcoal, all the three will allow the light to pass.

(vii) Which one of the following is not soluble in water? (a) Turmeric powder (b) Common salt (c) Alum (d) All are soluble Answer: (a) Only turmeric powder is not soluble in water.

(viii) Which object shines? (a) Plastic toy (b) Cotton shirt (c) Steel spoon (d) Stone piece Answer: (c) Steel spoon is a metallic object while all others are non-metals.

(ix) Which of the following has reddish brown colour? (a) Gold (b) Copper (c) Iron (d) Brass Answer: (c) Iron has reddish brown colour.

(x) Which one of the following is insoluble in water? (a) Alcohol (6) Sodium chloride (c) Coconut oil (d) Sugar Answer: (c) Coconut oil is insoluble in water.

Extra Questions for Class 6 Science

Free resources.

NCERT Solutions

Quick Resources

IRIS MABRY-HERNANDEZ, MD, MPH, AND RADHIKA AGARWAL, MD

Am Fam Physician. 2024;110(1):93-94

Related USPSTF:  Screening for Anxiety in Children and Adolescents

Related USPSTF:  Screening for Depression and Suicide Risk in Children and Adolescents

Author disclosure: No relevant financial relationships.

A 13-year-old patient with a history of eczema presents for a well-child examination. His height, weight, and development are appropriate for his age. His eczema is well controlled. He enjoys science class. His physical examination is unremarkable.

CASE STUDY QUESTIONS

1. According to the U.S. Preventive Services Task Force (USPSTF) recommendation statements, which of the following conditions should this patient be screened for?

A. Only anxiety.

B. Only depression.

C. Anxiety and depression.

D. The patient should not be screened for anxiety or depression.

2. Which one of the following is the USPSTF recommendation regarding screening for suicide risk in children and adolescents?

A. A recommendation: There is high certainty that the net benefit of screening is substantial.

B. B recommendation: There is high certainty that the net benefit of screening is moderate or there is moderate certainty that the net benefit is moderate to substantial.

C. C recommendation: There is at least moderate certainty that the net benefit of screening is small. Screening should be selectively offered or provided to individual patients based on professional judgment and patient preferences.

D. D recommendation: The USPSTF recommends against screening. There is moderate or high certainty that screening has no net benefit or that the harms outweigh the benefits.

E. I statement: Current evidence is insufficient to assess the balance of benefits and harms of screening.

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Mangione CM, Barry MJ, Nicholson WK, et al. Screening for depression and suicide risk in children and adolescents: US Preventive Services Task Force recommendation statement. JAMA. 2022;328(15):1534-1542.

Mangione CM, Barry MJ, Nicholson WK, et al. Screening for anxiety in children and adolescents: US Preventive Services Task Force recommendation statement. JAMA. 2022;328(14):1438-1444.

Viswanathan M, Wallace IF, Cook Middleton J, et al. Screening for depression and suicide risk in children and adolescents: updated evidence report and systematic review for the US Preventive Services Task Force. JAMA. 2022;328(15):1543-1556.

Viswanathan M, Wallace IF, Cook Middleton J, et al. Screening for anxiety in children and adolescents: evidence report and systematic review for the US Preventive Services Task Force [published correction appears in JAMA . 2023; 330(9): 880]. JAMA. 2022;328(14):1445-1455.

This series is coordinated by Joanna Drowos, DO, contributing editor.

A collection of Putting Prevention Into Practice published in AFP is available at https://www.aafp.org/afp/ppip.

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Class 6 Science Chapter 5 Case Based Questions - Body Movements

Case 1: Skeletal System

Sarah is a 10-year-old girl who loves to play sports. Recently, she fell during a game and injured her rib cage. She's curious about the bones in her body.

Q1: Explain to Sarah what the rib cage is and its function. Ans: The rib cage is a cone-shaped bony cage formed by 12 pairs of ribs that are attached to the vertebral column. It protects vital organs like the lungs and heart. Q2: Sarah wants to know why her rib cage is important. How would you explain it to her? Ans: Your rib cage is important because it acts like armor, keeping your delicate organs safe from harm. Q3: Which type of joint allows movement in all directions? (a) Hinge joint (b) Gliding joint (c) Ball and socket joint (d) Fixed joint Ans:  (c) Ball and socket joint

Case 2: Animal Locomotion

John is studying different animals and their methods of locomotion for his science project.

Q4: Describe how an earthworm moves and the role of its bristles. Ans:  Earthworms move by contracting and expanding alternate portions of their body. Bristles on the ventral surface help them grip the ground. Q5: Explain why an earthworm contracts and expands alternate portions of its body during movement. Ans: Earthworms contract the front part, grip the ground with bristles, and then drag the posterior portion forward, repeating this process to move. Q6: What type of joint allows only one-plane movement of up to 180⁰? (a)  Ball and socket joint (b)  Pivot joint (c) Hinge joint (d) Gliding joint Ans: (c) Hinge joint

Case 3: Bird Adaptations

Emma is fascinated by birds and wants to learn how they are adapted for different forms of locomotion.

Q7: Describe the adaptations of a bird's skeleton for both walking and flying. Ans:  A bird's skeleton is adapted for walking with light and strong bones. For flying, they have wings and tail feathers. Q8: Explain the role of feathers in a bird's ability to fly. Ans: Feathers provide lift and help birds control their direction during flight. Q9: What helps a snake move forward by making loops on its sides? (a)  Wings (b)  Muscles (c)  Ribs (d) Bristles Ans: (b) Muscles

Case 4: Fish Locomotion

Alex is studying fish and their swimming techniques for his biology project.

Q10: Describe the streamlined body of a fish and its importance in swimming. Ans:  Fish have streamlined bodies to reduce water resistance while swimming. Q11: Explain how the tail fin of a fish aids in changing direction during swimming. Ans:  The tail fin of a fish helps change direction by adjusting its position in the water. Q12: What type of joint allows movements in many planes, such as up and down and side to side? (a) Hinge joint (b) Gliding joint (c) Pivot joint (d) Ball and socket joint Ans:  (c) Pivot joint

Case 5: Skeletal Protection

Lily is learning about the protective functions of the human skeleton.

Q13: Explain how the rib cage protects vital organs like the lungs and heart. Ans:  The rib cage protects the lungs and heart by forming a bony cage around them. Q14: Describe the role of the vertebral column in providing support to the body. Ans:  The vertebral column provides support and allows flexibility for movements. Q15: How does a snail primarily achieve locomotion? (a) Muscular foot (b) Wings (c) Jointed legs (d) Slithering movement Ans: (a) Muscular foot

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Case Study Questions Class 6 Science Water

Case study questions class 6 science chapter 14 water.

CBSE Class 6 Case Study Questions Science Water. Important Case Study Questions for Class 6 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Water.

CBSE Case Study Questions Class 6 Science Water

Case study 1.

During the daytime, sunlight falls on the water in oceans, rivers, lakes and ponds. The fields and other land areas also receive sunlight. As a result, water from all these places continuously changes into vapour. However, the salts dissolved in the water are left behind.

Que. 1) Water can be converted into vapours through …………………………………………………………………………….………. .

(d) All of the above

Que. 3) Which of the following is a source of water?

Que.1. c) Heating

Que. 5) Answer: Due to the presence of sunlight during the day time, all the air in our surrounding gets heated. This heat helps in the evaporation of water in open surfaces. When a bucket full of water is kept in shade, the heat in the surrounding air slowly but continuously changes water into vapours.

Case study 2

The process of condensation plays an important role in bringing water back to the surface of earth. As we go higher from thesurface of the earth, it gets cooler. Whenthe air moves up, it gets cooler andcooler. At sufficient heights, the airbecomes so cool that the water vapourpresent in it condenses to form tinydrops of water called droplets. It is thesetiny droplets that remain floating in airand appear to us as clouds.It so happens that many droplets of water come together to form largersized drops of water. Some drops of water become so heavy that they begin to fall. These falling water-drops are, what we call rain. In special conditions, it may also fall as hail or snow. Thus, water in the form of vapour goes into air by evaporation and transpiration, forms clouds, and then comes back to the ground as rain, hail or snow.

d) None of the above

Que.3) Through the process of …………………………………………………………………………………… water comes back to the surface of the earth in the form of rain, hail or snow.

Que.5) Answer: Condensation helps in bringing back water to the surface of the earth. When water moves up as vapours through the processes of evaporation and transpiration, it gets cooler and cooler with increasing heights and at an ample height the vapour becomes so cool that water present in them condenses into tiny drops of water called droplets. It is these floating droplets of water that appear to us as clouds. With time, some of these droplets of water become so heavy that they begin to fall in the form of rain and sometimes as hail or snow.

Case study 3

d) Water cycle

Que.3. d) Water cycle

Case study 4

Que.1) Which of the following is difficult to get during drought conditions?

Que.4) How can excessive rainfall affect human and other living beings?

Case study 5

Que.1) The basic idea behind Rainwater harvesting is ……………………………………………………………………………………. .

Que.3. d) All of the above

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