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Q.4. Make a list of some more uses of water.
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Q.5. Where do humans use oxygen cylinders other than mountain climbing? Find out.
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Q6. Karisma was decorating her new house. She placed lots of indoor plants in her house. When
her aunt came to meet her, she found that there were many plants in Karisma’s bedroom. She
advised Karisma to keep those plants out of her bedroom. Karisma couldn’t understand the
reason. Write the reason so that Karisma can understand.
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