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How can we make a water filter in case when no clean water is available?

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What is the other name of vitamins and why they are called so?

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How can we change a gas into liquid?

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Write the examples of herbivores.

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What is meant by junk food?

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What do you know about algae?

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Why it is necessary to select food from all food groups?

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Define elastic objects.

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Why is it dark at night?

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What do you know about amphibians?

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What steps should be taken to reduce noise pollution?

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Why we hear less sound of a jet plane flying at very great height.Why?

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How filtration is done?

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Give five examples of liquids?

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Name a drink which can be prepared by mixing a solid, a liquid and a gas?

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Prove with the help of an activity that sound can travel through liquids.

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Why plants are called producers?

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Why do living things need food?

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Give examples of lever.

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How we get oxygen?

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