Ch. 2, Sect. 1 A Living Planet. Key Terms Continent Solar System Core Mantle Magma Crust Atmosphere Lithosphere Hydrosphere Biosphere Continental Drift.

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Presentation transcript:

Ch. 2, Sect. 1 A Living Planet

Key Terms Continent Solar System Core Mantle Magma Crust Atmosphere Lithosphere Hydrosphere Biosphere Continental Drift

The Solar System

The Solar System consists of the sun and eight* (8) known planets, as well as other celestial bodies that orbit the sun. The earth is 93 million miles from the sun. * (Pluto was downgraded from a planet to a “dwarf planet”)

The Structure of the Earth

Structure of the Earth (cont.) Inside the Earth: Core: solid metallic center made up of iron & nickel. Mantle: soft layer of molten rock about 1800 miles thick. Magma: is created when the mantle melts the underside of the crust. Crust: thin layer of rock at the earth’s surface.

Structure of the Earth (cont.) On and above the Earth: Atmosphere: layer of gasses that surround the earth. Lithosphere: the solid rock portion of the earth’s surface. Hydrosphere: is made up of the water elements on the earth. Biosphere: the part of the earth where plants and animals live

Continental Drift Dr. Alfred Wegener of Germany, in Stated that the Earth was once a super-continent that divided and slowly drifted apart over millions of years. This super-continent was called Pangaea, which means “all earth”.

In the beginning, PANGAEA

PANGAEA

The World Today…

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