Chapter-Chapter 8. A Journey through States of Water Science Curiosity class 6 in english Medium CBSE Notes

Chapter 8. A Journey through States of Water

This assignment is prepared according to the latest CBSE competency-based pattern and the NCERT Curiosity textbook. It includes objective, subjective, competency-based, case study, 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 strengthen your understanding of the chapter and improve your problem-solving skills.

Part A: Fill in the Blanks

Complete the following statements with suitable words.

1. Water naturally exists in __________ different physical states.
2. The gaseous form of water is called __________.
3. The process of changing liquid water into water vapour is called __________.
4. Water vapour changes into liquid water by the process of __________.
5. The conversion of ice into water is called __________.
6. The conversion of water into ice is called __________.
7. Evaporation produces a __________ effect.
8. High __________ increases the rate of evaporation.
9. The continuous circulation of water in nature is called the __________.
10. Clouds are formed due to the process of __________.

Part B: True or False

Write True or False for each statement.

1. Ice has a fixed shape and fixed volume.
2. Water vapour has a fixed shape.
3. Evaporation takes place only at 100°C.
4. Humidity decreases the rate of evaporation.
5. Condensation is the opposite of evaporation.
6. Clouds are formed due to melting.
7. Sweating cools our body because of evaporation.
8. Water cycle helps recycle water in nature.
9. Water is a renewable natural resource.
10. No new substance is formed during the change of state of water.

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. What is the gaseous form of water?
2. Which process changes water into vapour?
3. Which process forms clouds?
4. Name the cycle that continuously recycles water.
5. Which factor present in air slows down evaporation?

Part E: Very Short Answer Questions

Answer the following questions in one or two sentences.

1. What are the three states of water?
2. Why does evaporation produce cooling?
3. Define condensation.
4. What is humidity?
5. Why do wet clothes dry faster in sunlight?

Part F: Short Answer Questions

Answer the following questions in about 30–50 words.

1. Differentiate between evaporation and condensation.
2. Explain any four factors affecting evaporation.
3. Describe the formation of dew.
4. Why does water remain cool in an earthen pot?
5. Explain the importance of the water cycle.

Part G: Long Answer Questions

Answer the following questions in detail.

1. Describe the three states of water with suitable examples.
2. Explain the changes of state of water with the help of a flow diagram.
3. Describe the complete water cycle with labelled stages.
4. Explain the cooling effect of evaporation with suitable daily-life examples.
5. Discuss the importance of water conservation and suggest practical methods to save water.

Part H: Case Study

Read the passage carefully and answer the questions that follow.

Rohan washed his school uniform in the morning and hung it outside in the sunlight. A gentle breeze was blowing throughout the day. By afternoon, the clothes had become completely dry. Later, he noticed tiny water droplets on the outside of a bottle taken out from the refrigerator.

1. Which process helped the clothes dry?
2. Why did the clothes dry faster in the sunlight?
3. How did the wind help in drying the clothes?
4. Why did water droplets appear on the outside of the cold bottle?
5. Name the two changes of state involved in this case.

Part I: Competency-Based Questions

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

1. Why does a wet towel dry faster when spread open than when folded?
2. Why do farmers prefer open fields with moving air for drying harvested grains?
3. Explain why artificial grass feels warmer than natural grass on a hot day.
4. Why do people feel cooler after taking a bath during summer?
5. How does the water cycle help maintain the balance of nature?

Part J: HOTS (Higher Order Thinking Skills)

Think carefully and answer the following questions.

1. If there were no evaporation on Earth, what major changes would occur in our environment?
2. How would life be affected if condensation never occurred?
3. Why is evaporation slower on humid days even when the temperature is high?
4. Suppose all the glaciers on Earth melted rapidly. What effects might this have on humans and other living organisms?
5. Why is understanding the water cycle important for protecting water resources?

Self-Assessment Checklist

Tick (✔) the statements after completing this chapter.

• ☐ I can identify the three states of water.
• ☐ I can explain melting, freezing, evaporation, and condensation.
• ☐ I know the factors affecting evaporation.
• ☐ I can explain the cooling effect of evaporation.
• ☐ I understand how clouds are formed.
• ☐ I can describe the stages of the water cycle.
• ☐ I can solve competency-based and case study questions.
• ☐ I am confident about this chapter for my CBSE examination.

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