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Why clear swimming pools look shallower than their actual depth?

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Define zygote?

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Write a note on the following:

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What does chemical formula show?

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What happens, when light travels from glass into air at an angle?

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Write the chemical change in carbon?

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Why do we use woolen clothes and blankets during winter days?

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Which surfaces are the bad emitters of radiation?

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Define refraction?

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Which part of a seed develops into the first root?

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How can we obtain other colours?

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Why it is advised to wear white or light colored clothes during hot summer days?

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Define critical angle?

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Describe the everyday applications of convection currents

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Describe the physical and chemical changes taking place in enviroment

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Construct a food chain with three links?

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List the colours of light using a prism.

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Why is radiation the only type of heat transfer by which sun’s energy can move to earth?

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What is meant by reduce, refuse and recycling?

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How did Babar conquer Chanderi?

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