Earth

What periods of the Earth's history had glaciers covering a lot of the Earth?

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What submersible helped to discover the wreckage of the Titanic in 1986?
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What country forms a 2000-mile archipelago along the east coast of Asia?
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Which is the smallest planet in Earths solar system?
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What is the nickname of Katmai in Alaska?
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Which of the following is not a major component of an ecosystem?
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What makes Florida's Tampa Bay a unique aquatic environment?
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What happens to the air pressure as we increase our altitude?
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