The planet retains an atmosphere when?
Correct answer: D. Gravity is great and temperature of atmosphere is low
- A. Gravity is low and temperature of atmosphere is great
- B. Gravity and temperature both are great
- C. Gravity and temperature both are constant
- D. Gravity is great and temperature of atmosphere is low
Explanation
A planet retains an atmosphere more effectively when its gravity is strong enough to hold gas particles and the atmospheric temperature is low enough to limit their speed. Weak gravity and high temperature allow gases to escape into space.
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