+ What is it made up of?Four different layersCrustMantleOuter CoreInner Core
+ The Crust The part we live on Thin like the skin of an apple 3-5 miles thick under the oceans crust and 25 miles thick under the continents. Temperatures vary from air temperature to 1600 degrees. The crust is in pieces called plates. These move along on top of the mantle. Sometimes they cause earthquakes!
+ What is the Crust made of? Continental crust made of Granite Granite Oceanic crust made of volcanic lava rock called basalt Basalt The crust and the upper layer of the mantle make a zone of brittle rock called the Lithosphere.
+ Tectonic Plates Slabs of rock made out of the continental and oceanic crusts Pacific and Antarctic Plates are the largest Like icebergs only the tops of them are seen They slowly bump into one another like bumper cars At their boundaries earthquake and volcanic activity occur
+ The Mantle Largest layer 1800 miles thick Has hot and dense rock The rock moves because of temperature change The movement causes the plates to move in the crust The mantle can be 1600- 4000 degrees
+ Convention Currents The mantle flows because of these Caused by hot material rising, cooling, and sinking over and over again.
+ Outer Core Like a ball of hot metal Made of melted nickel and iron Located1800 miles beneath the crust 1400 miles thick
+ Inner Core Is so hot and has so much pressure that it becomes a solid Located 4000 miles beneath the crust 800 miles thick 9000 degrees 3,000,000 times the air pressure at sea level on earth