1. EARTH

2. HOME SWEET HOME 3 rd Planet from the Sun

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

4. HOME SWEET HOME Hot dense core Mantle Thin rocky outer crust

5. HOME SWEET HOME 149.6 million km away from Sun

6. HOME SWEET HOME 365.26 days to orbit the Sun Orbits at an average speed of 108000km/s

7. HOME SWEET HOME 23.93 hours to rotate on its axis 23.5° tilt on axis

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

9. HOME SWEET HOME Not a perfect sphere

10. HOME SWEET HOME Water

11. STUDYING THE EARTH Thales proposed first model of a Geocentric universe

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

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

14. STUDYING THE EARTH 1797 Henry Cavendish determines weight of Earth

15. STUDYING THE EARTH 1944 Arthur Holmes Theory of Continental Drift

16. STUDYING THE EARTH 1946 first photos of Earth from space

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

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

19. Life on Earth Greenhouse gases Water stabilizes temp

20. SOURCES http://homepage.mac.com/dvhscience/SpaceAcademy/Projects/before2004/moon_triangulate/fourmilabimage.jpg http://www.aerospaceweb.org/question/astronomy/solar-system/solar-system.jpg http://www.spacetoday.org/images/SolSys/Earth/EarthBlueMarbleWestTerra.jpg http://www.bnsc.gov.uk/assets/channels/education/ae/Earth_interior.gif http://www.badastronomy.com/pix/bablog/2006/earthsun.jpg http://www.windows.ucar.edu/the_universe/uts/seasons_orbit.5x7.jpg http://cache.eb.com/eb/image?id=66792&rendTypeId=4 http://www-b.jpl.nasa.gov/images/earth/bulge_post1997_browse.jpg http://worthyourweight.files.wordpress.com/2007/11/flat-earth.jpg http://www.people.cornell.edu/pages/nrw22/astro/images/triangulation.jpg http://cache.eb.com/eb/image?id=64197&rendTypeId=4 http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Schiehallion_NW_ridge.jpg/300px- Schiehallion_NW_ridge.jpghttp://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Schiehallion_NW_ridge.jpg/300px- Schiehallion_NW_ridge.jpg http://pubs.usgs.gov/gip/dynamic/graphics/Fig2-5globes.gif http://content.answers.com/main/content/wp/en-commons/thumb/c/c3/180px-Cavendish-lab.jpg http://www.hcc.mnscu.edu/chem/abomb/Mass_Spec_of_U.jpg http://www.bethel.k12.ct.us/bhs/information/science/wcmaindiagram2.jpg http://www.airspacemag.com/space-exploration/FEATURE-FirstPhoto.html# http://solarsystem.nasa.gov/multimedia/gallery/GPN-2001-000009.jpg http://www.primidi.com/images/earth_with_and_without_life.jpg http://www.koshlandscience.org/exhibitgcc/images/causes02.jpg