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