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2. Why do we need to purify water? Write two methods of purifica on of
Water.
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3. What is water?
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4. What is evapora on? Explain with an example.
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5. What is condensa on? Explain with an example.
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6. What is chlorina on?
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7. What is filtra on?
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8. What is weather? What is the role of sun in weather change?
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9. What causes change in season? Explain.
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