Earth's atmosphere is divided into several distinct layers, each characterized by specific temperature variations, composition, and phenomena. Below are the primary layers of the atmosphere, from the ...

And in fact, before plants appeared on Earth, scientists think there was much more carbon dioxide but no oxygen in the early atmosphere. The composition of the atmosphere has changed over time ...

Many of these resources are finite, they will eventually run out. Composition of the atmosphere The air in the atmosphere is a mixture of gases. Most of the atmosphere is nitrogen (80% ...