Structure of the Earth Not so solid Earth. The Earth has three levels: Core, Mantle, Crust.

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Presentation transcript:

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)

Do the continents continue to drift today?

How can the presence of seven continents on the earth's surface be explained?