Science
Who was the first person to use a telescope for astronomy?
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What type of simple machine is used on a flag and flag pole?
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What process refers to the joining of pollen with an ovule to form a seed?
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Which of these is a virus that doesn't immediately cause damage to tissue?
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Which of the following characteristics is the force of gravity dependent on?
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What is a long balloon filled with helium generally called?
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What is the generic term for very small loose particles of hard, broken rock or minerals?
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What is the repeated sound when sound waves bounce off other objects called?
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