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Earn +20 ptsQ: Which planet has 20 percent oxygen?
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What planet has the atmosphere of about 20 percent oxygen?
Earth.
What planet has about 20 percent oxygen in its atmosphere?
Earth
Which planet has an atmosphere at 20 percent oxygen?
The closest match to this is Earth with about 21%. No other known planet has more than a trace of free oxygen.
What forms 20 percent of air?
Oxygen makes up about 20% of Earth's atmosphere.
Which planet's atmosphere is 78 percent nitrogen?
Earth's atmosphere is approximately 78 percent nitrogen, making it the planet with the highest concentration of nitrogen in its atmosphere.
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