CBSE/NCERT/Exercises/Class_06_Science
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Exercises and Questions for NCERT Class 6 Science - Nature's Treasures
1. Match the jumbled words with their corresponding natural resources shown in Fig. 11.9. Classify them as renewable or non-renewable.
2. State whether the following statements are True [T] or False [F]. If False, correct them.
3. Fill in the blanks using the most appropriate option—
4. Classify the following as renewable or non-renewable resources—coal, natural gas, forests and minerals.
5. Why do we say that petroleum is a non-renewable resource? Petroleum is considered a non-renewable resource because it takes millions of years to form from the remains of organisms buried deep inside the Earth. Once exhausted, it cannot be replenished within a reasonable period of time.
6. It is difficult to regrow forests. Justify this statement. Regrowing forests is difficult because it takes many years for a variety of trees, shrubs, and herbs to reach maturity and restore the complex ecosystem that supports a diversity of wild animals, birds, and insects.
7. Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
8. List four activities that are possible due to the presence of air.
9. How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
10. Answer the following questions based on the illustration where food is being cooked in a solar cooker:
11. Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so? Trees prevent soil erosion as their roots hold the soil particles together. Without trees, the top fertile layer of the soil is easily washed away by rain or wind. Also, decaying leaves from trees enrich the soil with nutrients, which stops when trees are removed.
12. Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
13. A family uses solar panels, a gas stove, and a windmill. What would happen if there were no sunlight for a week? If there were no sunlight for a week:
14. Fill up the blanks using the following terms—
15. Discuss the felling of trees for industrial/housing requirements. Felling trees on a large scale for industries or housing is not entirely justified because it leads to habitat loss, soil erosion, and climate change. Sustainable development should focus on building without destroying the existing green cover or ensuring compensatory afforestation.
16. Propose a plan to use less water in your school.
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