January 31, 2013
Our planet is the only planet with both liquid water and frozen ice that has an atmosphere rich in oxygen, and on which life exists.
Earth is surrounded by magnetosphere that protects it from the effects of the solar wind.
Earth's surface is shaped by plate tectonics. There are eight large plates and many smaller ones. Some consist only of ocean floor, while others include continents.
Students from grade 7C
January 30, 2013
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