1. Ch. 2, Sect. 1 A Living Planet

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

3. The Solar System

4. 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”)

5. The Structure of the Earth

6. 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.

7. 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

8. Continental Drift Dr. Alfred Wegener of Germany, in 1912. 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”.

9. In the beginning, PANGAEA

10. PANGAEA

11. The World Today…