Earth

What theory proposes that Earth's landmasses were once connected and drifted apart?

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What layer of the Earth's atmosphere contains the ozone layer?
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Which is the process of placing plants in a certain way in an area?
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A mountain breeze is what kind of wind?
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What is a worldwide increase in temperature called?
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In the United States, summer officially begins in which month?
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Thunderstorms form on what "lines"?
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What is another name for fossilized resin?
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What is the hardest mineral known on Earth called?
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