Carbon: An Important Element — Science STD 9 — Question

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When steam condenses to form water, heat is __________.

Water : Xylem :: Food : …………………………….

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In order that the force of gravitation between two bodies may become noticeable and cause motion, one of the bodies must have an extremely large ______.

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Echoes are caused by the ______ of sound.

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A sound wave consists of places of higher pressure called _____ and places of _____ pressure called _____.

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A potassium ion has positive change because it contains less _________ than __________.

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Acceleration is the rate of change of __________ It is measured in ___________.

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If the area of a snow shoe is five times ______ than the area of an ordinary shoe, then the pressure of a snow shoe on the snow is five times _______.

Secondary sexual characters in males : Testosterone :: Secondary sexual characters in females : …………………………….