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Why some gases are called rare gases what are these?

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What do you know about wind?

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What is a symbol?

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Differntiate between parasite and host?

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What is a mixture?

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Describe mutulism in termites?

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What do you know about the components of environment ?

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How would air compositio change if there were no plants?

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What do you know about oxygen gas ?

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What is an element .Also give example?

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Which components of air are elements and which are compounds?

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What is food chain?

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What do you know about carbon dioxide gas?

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How smog is produced?

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What is homogenous mixture?

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What do you know about parasitic larvae of wasps?

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What are omnivores?

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Which is the hardest matter on earth?

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How a molecule is formed?

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What is chromatography?

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