1. Unit Preview:

2. Engage:
Make a detailed drawing of what you think the inside of the earth looks like.

3. Unit: Earth History Topic: Earth Layers Page:#5
I CAN…
Identify the layers of the earth and explain the different characteristics.

4. Explain: Notes Earth is broken into four main layers:
1. Earth Layers (Density Layers)
Crust, mantle, outer core, inner core
2. As you go deeper:
The pressure increases
Temperature increases
Density increases

5. Density?
How tightly packed the molecules in the substance are.
A B

6. Scientists can not travel past the crust- so how do you think they know this?!

7. As of today, there are no machines that can carry humans into the center of the earth. If you were to dig a tunnel deep into the earth you would notice that the temperature would increase greatly and the pressure would squish/break any machine that you tried to send down there.

8. Explain: Notes 3. Evidence: Rock Samples- volcanoes expose
rocks from deep below the
surface
Seismic Waves- waves of energy
Due to earthquakes

9. Explain: History of Evidence
Evidence:Earth's structure

11. Two Truths and A Lie: The Crust
a. The crust is as thin as 10 km and as thick as 30 km.
b. The crust is liquid
c. The crust is the very top layer of the earth’s layers

12. Two Truths and A Lie: The Crust
a. The crust is as thin as 5 km and as thick as 70 km.
b. The crust is liquid
c. The crust is the very top layer of the earth’s layers

13. Two Truths and A Lie: The Mantle
The mantle is 2,886 km thick – the distance from Colorado to New York.
The mantle is extremely hot but solid
The mantle is made up of mostly granite and basalt

14. Two Truths and A Lie: The Mantle
The mantle is 2,886 km thick – the distance from Colorado to New York.
The mantle is extremely hot but solid
The mantle is made up of mostly granite and basalt

15. Two Truths and A Lie: The Outer Core
The outer core is 1,222 km thick – Colorado to Alabama.
The outer core is liquid molten metal.
The outer core has more pressure then the crust and mantle

16. Two Truths and A Lie: The Outer Core
The outer core is solid iron
The outer core is liquid molten metal.
The outer core has more pressure then the crust and mantle

17. Two Truths and A Lie: The Inner Core
The inner core is 1,222 km thick
The inner core is made of nickel and iron
The inner core is not as hot as the mantle

18. Two Truths and A Lie: The Inner Core
The inner core is 1,222 km thick
The inner core is made of nickel and iron
The inner core is not as hot as the mantle

19. Summary: Explain
Explain how an egg is a good representation of the layers of the earth.

20. Layers Review!! Order the cards from top layer bottom layer 1. Crust
2. Mantle
3. Outer Core
4. Inner Core

21. Layers Review!! Order the cards from thinnest thickest 1. Crust
2. Inner Core
3. Outer Core
4. Mantle

22. Layers Review!! Order the cards from coolest hottest 1. Crust
2. Mantle
3. Outer Core
4. Inner Core

23. Layers Review!!
The only liquid layer
Outer Core

24. Layers Review!! The two layers made from iron and nickel
Outer Core and Inner Core

25. Layers Review!!
The layer made from mostly basalt and granite
Crust

26. Layers Review!! The layer that generates the Earth’s magnetic field.
Outer core

27. Layers Review!!
The layer that contains convection currents that drive the movement of the crust.
Mantle