1. Journey to the Center of the Earth

2. White Board
Write down ideas/draw pictures as to how/why you think the world looks like it does today. Consider the following questions:
How does everything move?
How does this lead to earthquakes and volcanoes and other landforms?

3. Instructional Goals
Explain the differences between each of the four layers of the earth
Apply density to the layers of the earth

4. Layers of the Earth
Crust
Mantle
Outer Core
Inner Core

5. Crust Outermost layer of the earth Thinnest layer of the earth
Two types of crust
Continental and oceanic

6. Continental Crust Composed of granite Forms continents
Average thickness km

7. Oceanic Crust Composed of basalt Lies under oceans
Average thickness 7-10 km

8. Continental vs Oceanic Crust

9. Mantle The middle layer (between crust and core) The thickest layer
Hot slow flowing solid layer
Semi-solid

10. Outer Core vs Inner Core
Composed mostly of iron
Liquid
Mostly composed of iron
solid

11. Masses
List the layers of the earth from greatest mass to least mass in regard to the mass of the earth.
Crust
Mantle
Core

12. How do we know…
The composition of earth’s layers and what state of matter they are?

13. Two Types of Waves P-waves “primary” waves Forward backward motion
Pass through solids and liquids
S-waves
“secondary” waves
Side to side motion
Pass through solids, not liquids

14. Earthquake Picture

15. Journey to the Center of the Earth
Earth Layers Worksheet
JCE Narrative