Question

Select the materials of which atmosphere is composed

Answer 1

It is mostly nitrogen (78%) and oxygen (21%) and a few other gasses like 0.93% argon, 0.038% carbon dioxide and probably some others

Answer 2

2 gases make up the earths atmosphere, nitrogen which comprises 78% of the atmosphere, and oxygen which accounts for 21%.

The atmosphere is divided into 4 layers, the troposphere, stratosphere, mesosphere, and the thermosphere.