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How pulleys work in water pump?

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Compare the properties of solution and suspension?

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How aquatic animals get oxygen?

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Write the uses of pulley in our daily life.

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When gear system used to increase the force?

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Find out the action of a pulley system is altered by changing the tension of the band connecting two pulleys.

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Describe the form of energy transfer in an enviroment.

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Explain how energy transfer takes place in an environment?

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Why some gases are called rare gases what are these?

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Why oxygen gas is important?

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What is greenhouse effect?

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Why does sodium form a chemical bond with chlorine?

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Define producer with example?

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Describe the relationship between biotic and abiotic components of the enviroment.

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How artificial rain is caused?

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What is international space station?

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What do you know about wind vane?

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Design a activity to make an optical instrument using mirror?

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What is chromatography?

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How carbon dioxide is produced?

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