Where is the majority of Earth's nitrogen found?

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Multiple Choice

Where is the majority of Earth's nitrogen found?

Explanation:
Most nitrogen on Earth is stored as nitrogen gas in the atmosphere. The atmosphere contains about 78% nitrogen by volume, which makes it by far the largest reservoir of nitrogen compared with other sources like oceans, soils, and living organisms where nitrogen is found mainly in various compounds (nitrates, ammonium, organic N). Because of this huge atmospheric pool, the majority of Earth's nitrogen sits in the air we breathe, which is essentially the atmosphere. The other options describe much smaller reservoirs, so they don’t match the scale of the atmospheric nitrogen.

Most nitrogen on Earth is stored as nitrogen gas in the atmosphere. The atmosphere contains about 78% nitrogen by volume, which makes it by far the largest reservoir of nitrogen compared with other sources like oceans, soils, and living organisms where nitrogen is found mainly in various compounds (nitrates, ammonium, organic N). Because of this huge atmospheric pool, the majority of Earth's nitrogen sits in the air we breathe, which is essentially the atmosphere. The other options describe much smaller reservoirs, so they don’t match the scale of the atmospheric nitrogen.

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