Multiple choice

Atmospheric pressure exerted on earth is due to

  1. rotation of earth

  2. revolution of earth

  3. gravitational pull

  4. uneven heating of earth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Atmospheric pressure is the force exerted by the weight of air molecules in the atmosphere. This weight exists because of Earth's gravitational pull, which attracts gas molecules toward the planet's surface, creating pressure that decreases with altitude.

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