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Q1
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What is the process where the molecules of buried bones are slowly replaced over the course of centuries by rock-forming minerals, like iron and silica?
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Q2
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Why is it hotter at the Equator than other regions of the Earth?
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Q3
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What is a true vacuum?
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Q4
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Which of these is not typically recognized as a phase of the moon as seen from Earth?
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Q5
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Rayleigh scattering is responsible for which of the following?
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Q6
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How can you tell the age of a tree?
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Q7
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In terms of size, where does Earth fall among the planets in our solar system?
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Q8
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The surface of the Earth, including water surfaces, is not heated evenly. As such, the air above it has different temperatures, which causes which of the following?
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Q9
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Which of these clouds is sometimes referred to as a storm cloud?
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Q10
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Which of the following has the top ten tallest mountains in the United States?
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