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What was the first atomic model?

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What are the characteristics of pure water?

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How water is used in industries?

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How can we protect habitates?

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Write down the physical states of water ?

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What is ocean water?

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What is meant by drought?

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Design an activity for making plastic?

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Write the affects of air pollution?

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How compounds are formed?

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What is the use of phosphorus-32?

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Explain the law of constant composition?

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What is an ion? How ions are formed?

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What is meant by transpitation ?Elaborate.

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Verify the law of refraction with the help of an experiment?

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Why clear water is not necessarily safe to drink?

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How pollination is done by wind?

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Describe the working of fish eye view?

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White light is a combination of seven colours. Prove it by an activity?

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How we can purify water by chlorination?

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