The idea to when first atmosphere was made is difficult. The atmosphere is present from the beginning. This allowed human life on earth.
the earth first atmosphere is troposphere
The exosphere is the layer of the atmosphere first struck by sunlight
the atmosphere was snowy
the earth first atmosphere is troposphere
The most abundant element in earth's first atmosphere is nitrogen. This is a gas which makes 78% of the earth's atmosphere.
As you ascend into the first three layers of the atmosphere, the temperature decreases.
atmosphere
Just remember, the first layer of the atmosphere is the Troposphere
photosynthesis
Ozone
Atmosphere. Ozone is formed by interaction between oxygen in the atmosphere, and UV-C from the Sun.
Helium, and Hydrogen