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Kisachek [45]
2 years ago
14

How has earths atmosphere changed over time

Biology
2 answers:
Xelga [282]2 years ago
4 0

Answer:

When earth was first formed, its atmosphere was likely composed of hydrogen, helium, and other gases that contained hydrogen. ... Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds.

Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.

Hope that helped. x

-BARSIC- [3]2 years ago
3 0

Answer:

Hey mate....

Explanation:

This is ur answer.....

<em>When earth was first formed, its atmosphere was likely composed of hydrogen, helium, and other gases that contained hydrogen. Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds.</em>

Hope it helps!

Brainliest pls!

Follow me! :)

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