Chapter 2 Section 1 The Earth Inside and Out

Solar System ► The Solar system is the sun and the group of bodies that revolve around it. ► Almost all of Earth’s energy comes form the sun ► Satellites – A body that orbits a larger body. Moons are natural satellites

Know the order of the planets from the sun

The Sun, the Earth, and the Moon ► The diameter of the Earth is about 8,000 miles. ► ► The diameter of the Sun is about 865,000 miles. ► The Moon is 240,000 miles from the Earth. ► ► The Earth’s orbit averages about 93 million miles from the Sun. Cool Facts

The Solar System Rotation One complete spin of the Earth on its axis. Takes 24 hours. Solar energy hits only the half of the earth that is facing the sun. Revolution Earths movement around the sun. Takes 365 ¼ days to complete one revolution. Earth’s Tilt Earth is tilted at 23 ½ degree angle. North polar axis always points towards the North Star.

Rotation

Tilt

Revolution

The Earth System ► Earth System – Interactions of elements on and around our planet ► Broken into 4 parts *Atmosphere – layer of gases that surround earth *Lithosphere – Surface of the planet *Hydrosphere – all the water of the planet *Biosphere – Part of the earth where all plant and animal life exists

Alfred Wegener Father of plate tectonics 1915 German meteorologist 1 super continent which he named Pangaea General movement of Pangaea was to the west Provided detailed description of geologic features which the southern continents have in common Could not provide explanation for the breakup

Pangaea – the Supercontinent