The idea to when first atmosphere was made is difficult. The atmosphere is present from the beginning. This allowed human life on earth.
The exosphere is the layer of the atmosphere first struck by sunlight
the atmosphere was snowy
atmosphere
Just remember, the first layer of the atmosphere is the Troposphere
photosynthesis
Ozone
The Earth's first atmosphere was primarily composed of hydrogen and helium, similar to the composition of the solar nebula from which the Earth formed. Volcanic activity and comet impacts later contributed to the formation of the secondary atmosphere, rich in carbon dioxide and water vapor.
Atmosphere. Ozone is formed by interaction between oxygen in the atmosphere, and UV-C from the Sun.
by plants and the atmosphere
photosynthesis
Gagarin was the first person to leave the Earth's atmosphere.
carbon dioxide