The document summarizes the structure of the Earth, describing its three main layers - the core, mantle, and crust. The mantle is very hot at 1200°C, very thick at 2900km, and under great pressure. It moves due to convection currents. The crust varies in thickness between 8-75km depending on if it is oceanic or continental crust, with oceanic crust being heavier basalt and continental crust being lighter granite. The crust is broken into tectonic plates that move.

5. 75 km thick 8 km thick Granite light Basalt heavy MANTLE SEA

7. A B

8. http://www.mpm.edu/reef/pt-gif.html

9. Convection Currents

12. Structure of the Earth and Plate Boundaries 1. Draw a labeled diagram to show the structure of the Earth. 2. What is a Plate?(avoid the dinner joke) 3. What are the differences between continental crust and oceanic crust? 4. What is a convection current? 5. Add the main plate names to your map and arrows showing the direction of plate movement.

13. The Earth is divided into 3 Parts These are:- CORE MANTLE CRUST

14. The MANTLE is……. Very hot @ 1200 C Very thick @2900 km Under great pressure It moves!!!!!!!! Due to CONVECTION CURRENTS

15. The CRUST is ……. Thin in places 8km thick Thick in places 75 km thick Oceanic Crust (heavy) Continental Crust (light) BASALT GRANITE All crust is broken up into large plates(TECTONIC PLATES) These Plates MOVE!!!!