Earth

What is the estimate of the true age of a mineral or rock called?

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Where is the foggiest place in the world?
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What is the place where an air mass forms called?
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What line is at 0 degrees latitude?
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Galileo was a 17th century astronomer famous for discovering that the Earth did what?
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What is another name for layers of rock?
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What soft brown coal that has lost all of its moisture called?
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Which of these habitats is a dry one usually with sand and can sometimes be very hot?
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Which of the following describes a period of abnormally dry weather for a specific area?
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