. Light is a form of ______ that we can detect with our ______.

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Which is the nearest planet to the Sun

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Why do we need a Standard Meridian for India

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The smallest planet in the solar system is

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The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat in the west

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Define the following Threshold frequency and work function

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Which one of the following forces is a contact force

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Fill in the blank The planet farthest from the Sun is

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The movement of Earth around its axis is called

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Name the largest planet in the solar system

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The pitch of sound depends on frequency

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Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

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A pond contains clean water. Which of the following activities will produce least pollution of water

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The phenomenon of marble cancer is due to

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Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school

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Explain with a diagram how you can locate pole star with the help of the constellation Great Bear (Ursa Major).

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Write the names of all planets in Fig. 17.8.

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Look at Fig. 17.7 carefully and answer the following question

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Explain why we always see the same side of moon

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Fig. 17.6 shows comets without their tail. Show the tails of the comets at position A, B, and C. In which position will the tail be longest

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Suppose the moon emits light of its own. Would it still have phases? Justify your answer

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