1. Do Now #1
Using an internet capable device please research and record two possible answers to the following question:
How do we know what the center of the earth is like?

2. Plate Tectonics
EQs: What is the anatomy of the earth? How do we know the surface of the earth is moving?

3. Inside the Earth The earth is classified two different ways:
1. By chemical composition
2. By physical properties

4. Chemical Composition
The composition of the earth is divided into the crust, mantle, and core.
The crust is the outer-most layer of
the Earth. It is very thin, and makes up less than 1% of the earth’s mass.

5. Chemical Composition
The mantle is between the crust and the core. It makes up 67% of the earth’s mass. It is made of silicates.
The core is in the center of the earth,
and makes up 33% of the earth’s mass. It is made of Iron, Nickel, and a little Sulfur

6. Physical Properties
The physical properties of the earth are divided up differently.
The lithosphere is the outermost layer. It is made up of the crust and the
upper part of the mantle. This layer makes up the tectonic plates.

7. Physical Properties
Oceanic Crust and Continental Crust have different properties.
Oceanic Crust is made of basalt. It is only 5-7 km thick, but is denser.
Continental crust is made of granite. It is 10-70km thick.

8. Physical Properties The Asthenosphere is a soft layer of the mantle.
Pieces of the lithosphere move over this layer.
It is made of solid rock that can FLOW very slowly, like putty!
The Mesosphere is the strong, lower part of the mantle. It extends down to the core.

9. Physical Properties
The Outer Core is a liquid layer of the core. It is mostly liquid iron and nickel.
The Inner Core is solid and dense, and is also mostly iron and nickel.

10. Layers of the Earth Physical Properties Chemical Composition
Lithosphere
Asthenosphere
Convection currents
Mesosphere
Outer Core
Inner Core
Chemical Composition
Crust
Mantle
Core

11. Top Tab Chemical Composition Side
1. How much of the earth is the crust?
2. How thick is ocean crust? What is it made of? How does its density compare to continental crust?
3. How thick is continental crust? What is it made of? How does its density compare to continental crust?
Physical Properties Side
1. What is different about the lithosphere compared to the crust?
2. The lithosphere makes up the _______________ __________

12. Top Tab Chemical Composition Side
1. How much of the earth is the crust? Less than 1%
2. How thick is ocean crust? What is it made of? How does its density compare to continental crust? Ocean crust is 5-7km thick, and made up of denser basalts
3. How thick is continental crust? What is it made of? How does its density compare to continental crust? Continental Crust is 10-70km thick, and is made up of less dense granites.
Physical Properties Side
1. What is different about the lithosphere compared to the crust? The lithosphere is the crust AND upper part of the mantle
2. The lithosphere makes up the tectonic plates.

13. Second Tab Chemical Composition Side
1. What % of the earth is made up of the mantle?
2. What is the mantle made of?
Physical Properties Side
1. What is the asthenosphere like in texture?
2. What is the name of the movement that happens in the asthenosphere?
3. What is the mesosphere like in texture?

14. Second Tab Chemical Composition Side
1. What % of the earth is made up of the mantle? 67%
2. What is the mantle made of? silicates
Physical Properties Side
1. What is the asthenosphere like in texture? Soft and squishy, like silly putty
2. What is the name of the movement that happens in the asthenosphere? Convection currents
3. What is the mesosphere like in texture? Strong, solid rock

15. Third Tab Chemical Composition Side
1. What % of the earth is made up of the core?
2. What is the core made of?
Physical Properties Side
1. What state of matter is the outer core?
2. What state of matter is the inner core?

16. Third Tab Chemical Composition Side
1. What % of the earth is made up of the core? 33%
2. What is the core made of? Iron and nickel
Physical Properties Side
1. What state of matter is the outer core? liquid
2. What state of matter is the inner core? Solid