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In case of short circuit how does fuse help?

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How is lightning produced?

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The Moon does not produce light. Why does it appear bright?

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In which direction the light rays travels when they enter a room from a window pane?

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List down three examples of luminous objects?

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Wht is light? State its importance?

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If you keep a book at the table, it does not fall or move. Why?

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Name the kinds of lever

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Why a gas can be compressed but liquid and solid cannot be compressed?

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Describe the solid state of matter?

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How are the particles arranged in gases?

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Differentiate between evaporation and condensation?

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Give two suggestions to control air pollution?

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Write some causes which pollute the water.

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Plants are useful to protect our environment. Justify this statement

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How our enviroment is formed?

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On which thing , the survival of living organism depends upon?

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How are vaccines prepared?

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What do you know about virus?

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Why amphibians bury themselves in winter?

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