Earth

What is the boundary between two air masses called?

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On which continent is the biggest area of rain forest found?
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In which country is Fiordland, which contains the Milford Sound fiord, located?
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What is the hardest mineral known on Earth called?
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What are Earth's seven large land masses called?
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What were water mills used for in the 1700's in Europe?
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Yosemite National Park is an easily recognizable part of what batholiths?
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Which of the following is a renewable resource?
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What kind of calendar traditionally predicts the weather?
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