Gravitational pull
Rotation of earth
Revolution of earth
Uneven heating of earth
Answer is Wrong!
Answer is Right!
The correct answer is: A. Gravitational pull.
The atmosphere is held to the Earth by gravity. The gravitational pull of the Earth is what keeps the atmosphere from floating away into space. The atmosphere is made up of gases, and these gases are attracted to the Earth by gravity. The
closer you get to the Earth, the stronger the gravitational pull, and the more dense the atmosphere is. This is why the air is much thinner at high altitudes.The other options are incorrect because they do not explain why the atmosphere is held to the Earth.
- Option B: The rotation of the Earth does not affect the atmosphere. The atmosphere rotates with the Earth, so there is no difference in the atmospheric pressure at different points on the Earth’s surface.
- Option C: The revolution of the Earth does not affect the atmosphere. The atmosphere is not affected by the Earth’s orbit around the Sun.
- Option D: The uneven heating of the Earth does not affect the atmosphere. The atmosphere is heated by the Sun, but this does not affect the gravitational pull of the Earth.
In conclusion, the atmospheric pressure exerted on Earth is due to the gravitational pull of the Earth.