The mystery beneath the crust – explain?

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Describe the principal characteristics of environment?

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Define environmental studies?

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How many principal gases are there in the atmosphere ?

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Discuss the sources of odour pollution?

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What are the different hypotheses regarding the origin of the earth ?

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What do you mean by noise pollution ?

5

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Define water pollution?

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What is the meaning of odour pollution ?

5

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Explain with examples the natural changes of environment?

5

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Define ecosystem?

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Give a brief account of the components of environment.

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What are the sources of water pollution ?

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What are the uses of water ?

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What is the meaning and objective of environmental education ?

5

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