Earth

There are over one quadrillion of what animal on Earth?

More Questions from Earth
What must happen for a tree to become a fossil?
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What kind of storm might produce a "whiteout"?
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What is the most-spoken language in the world?
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What is the name of any body of igneous rock named for the Roman god of the underworld?
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What does the term "geocentric" mean?
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Who published the groundbreaking book "Principles of Geology" in 1830?
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A mountain breeze is what kind of wind?
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Which of these landforms is an area of land lying between hills or mountains?
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