1. Earth’s Layers
Crust
Mantle
Core

2. Watch the movie trailer for JOURNEY TO THE CENTER OF THE EARTH.
What characteristics do you think are true? Which do you think are not true?

3. The crust Layer of rock that forms “outer skin” of Earth
Made of solid rock
Includes Dry land
Includes Ocean floor
On the crust you will find:
Rocks/mountains
Soil
Water

4. The crust Outer “rind” of rock is thinner than the layer beneath it
Crust is thickest under high mountains
Crust is thinnest under the ocean
Oceanic crust
Crust beneath ocean
Consists of rocks such as BASALT
Dark rock with fine texture
Continental crust
Forms the continents
Consists of granite which is a light color and has a course texture

5. The Mantle Located beneath crust About 40 km beneath surface
Made of solid material-a layer of hot rock
Divided into to 3 layers
Lithosphere
Asthenosphere
Lower mantle

6. Lithosphere (“lithos” means stone)
Uppermost part of mantle
Similar to crust
Uppermost part of the mantle and the crust together =lithosphere
About 100 km thick and made of stone

7. Asthenosphere (“athenes” means weak)
Material is hotter and under increasing pressure
Softer than the rest of the mantle but still solid
Mantle just beneath the lithosphere is less rigid than the rock above
Somewhat soft and can be soft and bendable like plastic

8. Lower mantle
Beneath the asthenosphere
Solid
Extends to Earth’s core

9. Made of mostly metals (iron and nickel) 2 parts:
The Core
Made of mostly metals (iron and nickel)
2 parts:
Liquid outer core
Solid inner core

10. Outer Core Layer of molten metal Surrounds inner core
Under enormous pressure
Liquid layer

11. Inner Core Dense ball of solid metal
Extreme pressure squeezes the atoms of iron and nickel so much that they cannot spread out and become liquid
In addition to nickel and iron, the inner core also contains
Oxygen
Sulfur
Silicon

12. Diagram of Earth Layers
This Photo by Unknown Author is licensed under CC BY

13. How would you compare the layers of the Earth to an apple?
Layers of the Earth – Apple Analogy
How would you compare the layers of the Earth to an apple?
Skin: CRUST
Flesh: MANTLE
Core: OUTER CORE
Seeds: INNER CORE

14. Layers of mantle and core
This Photo by Unknown Author is licensed under CC BY-NC-ND