1Write a short note on air.
2Write a short note on water.
3Write a short note on soil.
4Write a short note on solar energy.
5Write the difference between biotic and abiotic components.
6Write the difference between reuse and recycling.
7What are the components of the environment? Write briefly.
8What is environment friendly behaviour? Explain.
9Which materials in your school could you use again? Mention them.
10Which materials have you seen being collected for recycling in your village or neighbourhood? Mention them.
11Describe how the balance of oxygen and carbon dioxide is maintained in the atmosphere.
12What can you yourself do to reduce environmental pollution? Explain.
13Plastic is considered a chief cause of environmental pollution. How can it be managed so that its effect is reduced? Give your reasons.
14What are abiotic factors? Write with examples.
15Which living things are called producers? Explain with examples.
16How do bacteria help keep an ecosystem in balance? Write your answer.
17Explain the biotic and abiotic components of a forest ecosystem.
18Hunters kill every sambar in a forest. What effect would this have on the ecosystem of that forest? Explain.
19Write the difference between aquatic and terrestrial ecosystems.
20Write the difference between producers and consumers.
21What is biodiversity? Give an example.
22How do the roots of plants prevent soil erosion?
23Why is the frog called a secondary consumer?
24Why is an ecosystem called a self-running system?