EARTH. HOME SWEET HOME 3 rd Planet from the Sun HOME SWEET HOME The largest of the 4 rocky planets 12756km.

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Presentation transcript:

EARTH

HOME SWEET HOME 3 rd Planet from the Sun

HOME SWEET HOME The largest of the 4 rocky planets 12756km

HOME SWEET HOME Hot dense core Mantle Thin rocky outer crust

HOME SWEET HOME million km away from Sun

HOME SWEET HOME days to orbit the Sun Orbits at an average speed of km/s

HOME SWEET HOME hours to rotate on its axis 23.5° tilt on axis

HOME SWEET HOME Acceleration due to gravity is 9.81m/s 2

HOME SWEET HOME Not a perfect sphere

HOME SWEET HOME Water

STUDYING THE EARTH Thales proposed first model of a Geocentric universe

STUDYING THE EARTH 1735 Team of scientists attempted to determine size of Earth Triangulation

STUDYING THE EARTH 1774 Nevil Maskelyne Schiehallion Experiment Attempted to determine mass of Earth

STUDYING THE EARTH 1797 Henry Cavendish determines weight of Earth

STUDYING THE EARTH 1944 Arthur Holmes Theory of Continental Drift

STUDYING THE EARTH 1946 first photos of Earth from space

STUDYING THE EARTH 1953 Clair Patterson Mass spectrography Uranium and lead Age of Earth

STUDYING THE EARTH Space Race –Apollo 8 (1968) RADARSAT-1 –1995

Life on Earth Greenhouse gases Water stabilizes temp

SOURCES Schiehallion_NW_ridge.jpghttp://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Schiehallion_NW_ridge.jpg/300px- Schiehallion_NW_ridge.jpg