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Describe simple process for manufacturing of plastics.

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What is meant by purification of water?

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How does binocular uses principle of total internal reflection?

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Design an activity to explain the effects of refraction?

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What is meant by normal?

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Name any two animals which are involved in pollination?

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Write down the applications of chemical changes?

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How does acid rain form?

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Write an activity to obtain a spectrum of colours?

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What is meant by total internal reflection?

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How do we see a mirage?

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What are optical fibres?

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Define the spectrum of light?

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Describe the working of fish eye view?

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What are the types of change?

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What is prism?

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Design an activity to observe conduction.

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How refraction take place?

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What are primary colours?

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What is an ecosystem?

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