Multiple choice

Which layer of the atmosphere has the highest density of gas molecules?

  1. troposphere

  2. stratosphere

  3. mesosphere

  4. thermosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gravity pulls atmospheric gases toward Earth's surface, making the lowest layer, the troposphere, the most compressed and dense. It contains about 75% to 80% of the atmosphere's total mass.

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