Basic Facts Name and History Parts Chemical Compisition Atmosphere Tectonic Plates Motion Magnetic Field Life factors 3rd planet 7.1 billion 149,600,000 km orbit 12,756.3 km - diameter x kg. or 5,973,600,000,000,000,000,000,000 kg. - mass Earths satellite: Moon Earths Greek name: Terra Mater mother earth Roman Mythology: Goddess of Earth, Tellus Fertile soil Copernicus ( 16th century ) Nineplanets.org Polishamericancenter.org Crust (0 40 km) Upper Mantle (40 400 km) Transition Region (400 650 km) Lower Mantle (650 2,700 km) D Layer (2,700 2,890 km) Outer Core (2,890 5,150 km) Inner Core (5,150 6,378 km) (http://library.thinkquest.org) 34.6% iron 29.5% oxygen 15.2% silicon 12.7% magnesium 2.4% nickle 1.9% sulfur 0.05% titanium Nineplanets.org North American Plate South American Plate Antartic Plate Eurasian Plate African plate Indian Australian Plate Nazka Plate Pacific Plate Ellipse Axis is a slight tilt Shields us from charged particles from the Sun The flow of liquid Iron generates electric currents. Temparature Atmosphere Water Energy Nutrients Earths population Nineplanents.org: earths mass, diameter, satellite & Tectonic Plates School: earth being the 3rd planet, the moonOrbit Imagesangry.com: earth gifInfo. About the AtmosphereEarths motionMagnetic FieldLife factors