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Q 1. By which process producers like plants and blue green algae produce their food
Photosynthesis
Digestion
Both (A) & (B)
None of these
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Q 2. The microorganisms that break down the complex organic substance into simple inorganic substance that go into the soil and are used up once more by plants are
Consumers
Producers
Decomposers
None of these
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Q 3. Which of the following constitute a food-chain?
Grass, wheat and mango
Grass, deer and Lion
Goat, cow and elephant
Grass, fish and goat
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Q 4. The decrease of ozone in the atmosphere has been linked to synthetic chemical which is used as refrigerants and in fire extinguishers. This chemical is
Chlorofluorocarbons
Carbon monoxide
Carbon dioxide
None of these
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Q 5. Which of the following are environment friendly practices?
Carrying cloth bags to put purchases in while shopping
Switching off unnecessary lights and fans
Walking to school instead of getting your mother to drop you on her scooter
All of the above
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Q 6. In food chain 
Percent of energies transfer will be respectively
1, 10, 10
90, 10, 10
1, 1, 1
1, 10, 0
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Q 7. The best source of energy is
Water
Soil
Plants
Ponds
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Q 8. Ozone depletion can lead to
Skin cancer
Eye cataract
Both A and B
Brain cancer