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Earth’s Structure The egg that you live on. Parts of the earth  Hydrosphere- water makes up about 70% of the earth’s surface.  Lithosphere- the earth’s.

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Presentation on theme: "Earth’s Structure The egg that you live on. Parts of the earth  Hydrosphere- water makes up about 70% of the earth’s surface.  Lithosphere- the earth’s."— Presentation transcript:

1 Earth’s Structure The egg that you live on

2 Parts of the earth  Hydrosphere- water makes up about 70% of the earth’s surface.  Lithosphere- the earth’s rocky, outermost layer.

3 Parts of the Earth  Atmosphere- the layer of gases surrounding the earth.  Biosphere- the area on or near the earth’s surface that supports plant & animal life.

4 Earth’s Structure  Core- mostly iron & nickel.  Mantle- a layer of semi-solid rock around the core; 1800 miles thick.  Crust- thin, rocky surface layer; 4 to 45 miles thick.

5 Convection Currents  The heating & cooling of the mantle that causes the crust to move.  Internal force responsible for building new landforms.

6 Plate Tectonics  The theory that the earth’s outer shell is not one solid piece of rock but is broken into a number of moving plates.

7 Continental Drift  The theory that the continents were once part of one large landmass & moved to their present positions after millions of years.


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