Earth

Earth's atmosphere has 7 layers. The lowest layer is called troposphere. Rain, snow and wind only take place in the troposphere. There is an upper atmosphere. There is a lower atmosphere. A rocket travels through the 7 layers of the atmosphere. Then the rocket goes into space.
This is the earth.

The earth has 3 parts: land, water and air.

This is the atmosphere.

The atmosphere is the air around the earth. The atmosphere has some oxygen. Animals and people must have oxygen to live.
A long time ago, the earth had no atmosphere. Then plants began growing. Plants helped to make oxygen for air. The atmosphere began to cover the earth.