Question

Name two factors which determine whether a planet would have an atmosphere or not.

Answer 1

Explanation:

The thickness of a planet's atmospheredepends on the planet's gravity and thetemperature of the atmosphere. A planetwith weaker gravity does not have as strong a hold on the molecules that make up itsatmosphere as a planet with stronger gravity.The gas molecules will be more likely to escape the planet's gravity.

Answer 2

The two such factors which determine whether a planet would have an    atmosphere or not are as follows:

(i) The value of acceleration due to gravity on the planet.

(ii) Surface temperature of the planet.