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Explain why an opaque or non-luminous objects appear to be of certain colour.

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Explain the use of hydrocarbons as fuel?

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Describe the working of fish eye view?

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Describe the working of fish eye view?

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List the colours of light using a prism.

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Explain refraction of light through prism?

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Describe the everyday applications of convection currents

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Write an activity to show reactions of marble with bleach.

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Suggest how birds can glide in the air for hours

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White light is a combination of seven colours. Prove it by an activity?

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Verify the law of refraction with the help of an experiment?

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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 physical change? Explain it with examples.

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Design an activity to explain convection in gases.

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Design an activity for making plastic?

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What do you know about grassland habitat ?

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Why fresh water is important?

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Define chemical formula?

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How can we purify water by the use of potash alum?

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What is meant by wetlands?

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