1. Structures of the Earth
4 Layers of the Earth

2. Essential Standards
6.E.2 Understand the structure of the earth and how interactions of constructive and destructive forces have resulted in changes in the surface of the Earth over time and the effects of the lithosphere on humans.

3. Clarifying Objectives
6.E.2.1 Summarize the structure of the earth, including the layers, the mantle and core based on the relative position, composition and density.

4. Essential Questions What are the Layers of the Earth?
What is the order of DENSITY of the Earth’s Layers?
What materials & elements make up each layer of the Earth?
What position from inner to outer are the Earth’s Layers found?

5. EOG Questions What is the COMPOSITION of the Earth’s core?
What is the order of DENSITY of the Earth’s Layers?

6. Where it all Starts The Earth- the earth is made mostly of rock
75% or ¾ of the earth is covered in liquid water
There are 4 layers to the earth…
Inner Core
Outer Core
Mantle
Crust

7. Layers of the Earth
Layers of the Earth- Physical Structure of the Earth from inside to outside
Layers of the Earth tell scientists
Position
Composition
Density

8. Earth’s Density
Remember that DENSITY is how closely pact TOGETHER ATOMS are
The 4 Layers of Earth has a very distinct Density
The layers get more & more dense the closer you get to the CENTER of the Earth
Crust is the LEAST DENSE
Inner Core is the MOST DENSE

9. Essential Questions Get with a partner and answer…
What are the Layers of the Earth?
What is the order of DENSITY of the Earth’s Layers?

10. Earth’s Core The Earth’s Core make up the first 2 Layers of Earth
They make up the
Inner Core
Outer Core

11. Inner Core The Inner Core is the DENSEST of the 4 Layers of Earth
It is COMPOSED (made) of SOLID IRON
Inner Core is located at the very CENTER of the Earth

12. Outer Core The Outer Core is still very dense it ranks 2nd in DENSITY
Outer Core is composed of LIQUID IRON
Located as the SECOND layer of the Earth

13. Essential Questions Get with a partner and answer…
What materials & elements make up each layer of the Earth?

14. Mantle Mantle ranks 3rd in DENSITY behind the Inner & Outer Core
Mantle is composed of a combination of ROCKS & GASSES that make LIQUID MAGMA
The Mantle makes up the 3rd layer of the Earth

15. Essential Questions Get with a partner and answer…
What materials & elements make up each layer of the Earth?

16. Crust
The Earth’s Crust ranks last (4th) in DENSITY as it is the LEAST dense layer of the Earth
The Crust is composted of the Crustal Plates & Ocean Basin Plates
It also contains the Athenosphere & Lithosphere
It makes up the 4th Layer of the Earth

17. Essential Questions Get with a partner and answer…
What materials & elements make up each layer of the Earth?

18. Essential Questions Get with a partner and answer…
What position from inner to outer are the Earth’s Layers found?

19. EOG Questions Which best describes the Earth’s Crust?
A) It is stationary and unable to move.
B) It is thicker than the mantle and the core.
C) It is located between the outer and the inner core.
D) It is composed of continental and oceanic plates.

20. EOG Questions
Which best summarizes the COMPOSITION of the Earth’s Core?
A) It contains a solid outer region surrounding a liquid iron core.
B) It contains a liquid outer region surrounding a solid iron core.
C) It contains a semi-liquid rock outer region surrounding a liquid core.
D) It contains a basalt, semi-liquid outer region surrounding a solid core.

21. Important Points The Earth has 4 Layers that tell scientists
Position
Composition
Density
Inner Core
Center of the Earth
SOLID IRON
MOST DENSE
Outer Core
2nd from the Center
LIQUID IRON
2nd most DENSE
Mantle
3rd from the Center
LIQUID Magma
3rd most DENSE
Crust
LAST layer of Earth
Crustal Plates & Oceanic Basin Plates
LEAST DENSE
Crust also includes
Athensophere
Lithosphere