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Structure of the Earth Not so solid Earth
The Earth has three levels: Core, Mantle, Crust
Is the center of the earth Consists of iron and nickel
Mantle Surrounds the core Consists of the earth’s mass Contains molten rock called magma
Crust Thin layer of rock at the earth’s surface
On and above the earth Atmosphere Lithosphere Hydrosphere Biosphere
Atmosphere A layer of gases surrounding the earth Contains the oxygen we breathe Protects earth from radiation and space debris Provides medium for weather and climate
Lithosphere The outer shell of the earth Includes the crust and uppermost mantle
Together, the hydrosphere, lithosphere, and atmosphere form the... biosphere
Continental Drift Theory Presented by Alfred Wegener Earth was once a supercontinent that divided and slowly drifted apart over millions of years Wegener called the supercontinent Pangea(all earth)
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