Science
What is a steep-sided circular depression commonly known as?
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What is the generic term for very small loose particles of hard, broken rock or minerals?
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Who is regarded as the man who invented the telephone?
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If a jet cruises at 575 mph, how far will it go in 12 hours?
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What type of circulatory system pumps blood into cavities instead of through vessels?
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Which of these is a virus that doesn't immediately cause damage to tissue?
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What is the female reproductive cell of flowering plants?
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Which is the organelle involved with waste removal?
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