In the earth’s atmosphere, what changes in the atmospheric pressure?

In the earth’s atmosphere, what changes in the atmospheric pressure?
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Answer :

Decreases with height
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Which gas is the most found in abundance in the earth’s atmosphere?

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Are reservoirs that chemical elements can move through as part of the Earth's biogeochemical cycle I.the solid Earth II.Earth's oceans III.Earth's atmosphere IV.organisms on Earth?

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What is the order of the four most abundant gases in the Earth's atmosphere from most abundant to least abundant?

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