Earth

78% of the earth's atmosphere is composed of which gas?

More Questions from Earth
Which of these habitats is a dry one usually with sand and can sometimes be very hot?
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Groundhog Day predicts how long what will last?
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What instrument indicates wind direction?
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Where is the foggiest place in the world?
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What mountains separate Europe from Asia?
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What does the Saffir-Simpson scale measure?
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What is the repeating cycle of precipitation, condensation and evaporation called?
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What region surrounds the North Pole?
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