Class 6 Science Curiosity Solutions English Medium

NCERT Solutions Class 6 Science Curiosity English Medium

Chapter 9. Methods of Separation in Everyday Life

Topic: Assignments - What Have You Learned?

Chapter 9. Methods of Separation in Everyday Life

This assignment is prepared according to the latest NCERT Curiosity textbook and CBSE competency-based pattern. It includes objective, subjective, competency-based, and HOTS questions to help students revise the complete chapter effectively.

Assignments – What Have You Learned?

Attempt all the following questions without referring to the textbook. These questions will help you strengthen your conceptual understanding and improve your examination skills.

Part A: Fill in the Blanks

Complete the following statements using suitable words.

1. A __________ is a physical combination of two or more substances.
2. The method used to remove stones from rice is __________.
3. __________ is used to separate grains from harvested stalks.
4. __________ separates lighter husk from heavier grains.
5. __________ separates particles of different sizes.
6. The process of settling heavy particles is called __________.
7. The clear liquid is separated by the method of __________.
8. __________ is used to separate insoluble solids from liquids.
9. Salt is obtained from seawater by __________.
10. Butter is separated from curd by __________.

Part B: True or False

Write True or False for each statement.

1. Handpicking is suitable for removing visible impurities.
2. Winnowing separates substances based on colour.
3. Filtration is used to separate insoluble solids from liquids.
4. Evaporation is used to obtain salt from seawater.
5. Sedimentation occurs only in solids.
6. Magnets attract iron filings.
7. Churning is used to separate butter from curd.
8. Sieving separates particles according to their size.
9. Every mixture can be separated by the same method.
10. Methods of separation are useful in everyday life.

Part C: Match the Following

Match Column A with the correct option in Column B.

Part D: One Word Answer

Answer each question in one word or one term.

1. Name the process of separating grains from stalks.
2. Which method uses a magnet?
3. What is the liquid obtained after filtration called?
4. What is the solid left on the filter paper called?
5. Name the method used to separate flour from bran.

Part E: Very Short Answer Questions

Answer the following questions in one or two sentences.

1. What is a mixture?
2. Why is separation of substances necessary?
3. What is sedimentation?
4. What is decantation?
5. Give one example of filtration.

Part F: Short Answer Questions

Answer the following questions in about 30–50 words.

1. Differentiate between sieving and filtration.
2. Explain the process of winnowing with an example.
3. Why is handpicking suitable only for small quantities?
4. How does magnetic separation work?
5. Explain the process of obtaining salt from seawater.

Part G: Long Answer Questions

Answer the following questions in detail.

1. Describe any five methods of separation used in everyday life with suitable examples.
2. Explain how sedimentation, decantation, and filtration are used to obtain clean water.
3. Discuss the importance of separation methods in homes, agriculture, and industries.
4. How do physical properties help in selecting the correct method of separation? Explain with examples.
5. Why is no single method suitable for separating every type of mixture?

Part H: Case Study

Riya's mother washed rice before cooking. Small stones were removed by hand. Later, she prepared tea and used a strainer to separate the tea leaves. In the evening, she collected butter from curd using a traditional churner.

Answer the following questions.

1. Which method was used to remove stones from rice?
2. Which method was used to separate tea leaves?
3. Which method was used to obtain butter?
4. Why are different methods needed for different mixtures?
5. Name one other daily-life activity where filtration is used.

Part I: Competency-Based Questions

Answer the following questions by applying your understanding of the chapter.

1. Why is a sieve not suitable for separating salt dissolved in water?
2. Why do farmers prefer winnowing on a windy day?
3. How would you separate iron nails mixed with sand? Give the reason.
4. A student mixed chalk powder with water. Which method would you suggest to separate them and why?
5. Why is filtration considered a better method than decantation for obtaining cleaner water?

Part J: HOTS (Higher Order Thinking Skills)

Think carefully and answer the following questions.

1. If magnets suddenly lost their magnetic property, which separation method would no longer work? Explain.
2. Can you separate sugar dissolved in water by filtration? Justify your answer.
3. Suppose there is no wind. How would farmers separate husk from grains?
4. Why do modern water purification systems use more than one separation method?
5. How do separation methods help in protecting the environment and reducing waste?

Self-Assessment Checklist

Tick (✔) the statements after completing this chapter.

• ☐ I can explain what a mixture is.
• ☐ I can identify different methods of separation.
• ☐ I can choose the correct separation method for a given mixture.
• ☐ I understand filtration, sedimentation, and decantation.
• ☐ I can explain magnetic separation and churning.
• ☐ I can solve competency-based and case study questions.
• ☐ I am confident about this chapter for my CBSE examination.

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