The atmosphere. Composition and structure. Educacion Primaria, Secundaria.
The atmosphere. Composition and structure The Earth’s atmosphere is a mixture of gases called air. Air is composed by: – 78% Nitrogen (N2) – 21% Oxygen (O2) – 0,03% Carbon dioxide (CO2) – 0,97% other gases (water vapour, argon, etc.) The atmosphere was very different 4600 million years ago. The primitive atmosphere was made up […]