1. The Chemical Layers of the Earth

2. What does this graph show us? Density of Earth as Distance from Core Increases

3. Remember when the Earth was molten? …

4. More dense elements “sank” to center of Earth!

5. 3 Chemical Layers of Earth Based on what chemicals make up the layer, called “chemical composition” Crust, Mantle, and Core

9. What is the Crust? The layer that forms the EARTH’S SURFACE Two types: oceanic and continental Mostly Oxygen, Silicon, and Aluminum

10. How thick is the crust? Continental Crust: 5-25 miles thick Oceanic Crust: 3-5 miles thick

11. What is the Mantle? Inside Earth, under crust. Rich in Magnesium, Oxygen, and Silicon 1800 miles thick

12. What is the core? The CENTER of the Earth Mostly Iron and Nickel 2,200 miles thick

13. A cross section of the layers of the earth