Friday, July 25, 2008
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.
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.
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