1. Bell work Pick a science word and write the definition. Chapter 7
You will need a small white board today.

2. Title of Notes: Layers of the Earth
Pgs. 7 – 10 RS

3. Goal: I can name all four layers of the Earth in order.
Self-assessment worksheet
Pg. 5 RS
Write your goal for the lesson on your self assessment worksheet.
Complete the before column of your worksheet.
Goal: I can name all four layers of the Earth in order.

4. I’ll know I’ve got it when…
Learning target
I can name all four layers of the Earth in order.
Today I am…
learning about the layers of the Earth.
So that I’ll be able to…
understand what makes these layers unique.
I’ll know I’ve got it when…
I can list some properties and composition of the crust and mantle.

5. Earth’s layer classification
Composition and physical properties.

6. Crust (Lithosphere) Mantle (Asthenosphere and Mesosphere)
Earth’s structure
Crust (Lithosphere)
Mantle (Asthenosphere and Mesosphere)

7. Crust
Thinnest layer.
Two types:
Continental
Oceanic

8. The crust is 70 miles of rock and loose materials.
Under the continents, the crust is almost 3x as thick as it is under the oceans.

9. Crust – Physical properties
Temperature: Approx. 392°F - 752°F
km thick
(To calculate km to miles, we take km and multiply by 0.62)
The temperature increases with depth.

10. Quick check (in class)
Turn to a partner at your table and tell them which letter you think represents continental and oceanic crust and why. A B

11. Mantle
The mantle extends to 1,800 miles and it is about 67% of the total mass of the Earth.

12. Two parts (Asthenosphere – upper and Mesosphere – lower)
Mantle
Two parts (Asthenosphere – upper and Mesosphere – lower)

13. It has Olivine, iron, magnesium, and many silicate compounds.
Mantle - Composition
It has Olivine, iron, magnesium, and many silicate compounds.

14. Mantle - Composition The first 50 miles: Hard rigid rock.
The next 150 miles or so: Super-heated solid rock. (Weak due to heat energy)
Below that: Solid and sturdy rock.

15. Mantle – Physical properties
Temperature: From approximately 1,600°F - 4,000°F.
The lower mantle is more solid than the upper mantle.
Is the upper mantle closer or further away from the crust?

16. Write one thing you can remember about the mantle.
Quick check (in class)
On your white board……
Write one thing you can remember about the mantle.

17. The lighter materials make up the outer layers.
The densest materials make up the inner layers.

18. Outer Core - Composition
Made up of super-heated molten magma.
Mostly iron and nickel.

19. Outer Core – Physical properties
Appx. 3,000 miles deep.
Appx. 1,364 miles thick.

20. Outer Core – Physical Properties
Liquid
Has the ability to flow
Temperature: Appx. 4,000°F – 9,000°F

21. The Earth’s outer core was discovered by Beno Gutenberg in 1913
The Earth’s outer core was discovered by Beno Gutenberg in The area lies about 1800 mi beneath our feet. He was studying seismic waves traveling through the earth using seismographs stationed around the planet.
He discovered that S waves which are known as shear waves stopped 1,790km inside the Earth. S waves are shear waves that only travel through solids. He inferred from this data that Earths core was liquid and must lie in the center of the Earth.
Follow-up investigations by other scientists have proven this to be true.
Beno Gutenberg

22. Inner Core

23. Inner Core - Composition
Composed of Iron and Nickel.

24. Inner Core – Physical Properties
Solid
Appx. 4,000 miles deep.
Appx. 754 miles thick.
Temperature: Appx. 10,000 °F +

25. The inner core was discovered by Inge Lehmann studying great earthquakes in her native Denmark.
She discovered that some seismographs had recorded a few P waves from the earthquake that seemed to have traveled part way through the Earth's core and then were deflected.
Lehmann continued to study earthquake wave patterns and presented her scientific paper on her theory of the Earth's inner core in It was not until 1970 when extremely sensitive instruments were able to confirm her hypothesis.
Inge Lehmann
A large earthquake in New Zealand occurred in 1929.

26. Mantle – Upper = viscous Lower = solid
Crust = solid
Mantle –
Upper = viscous
Lower = solid
Outer core = liquid
Inner core = solid

27. Video: Structure of the Earth (3:00 minutes)
Four Layers of the Earth

28. Everyone must share their favorite!
Group discussion
Think back to what you learned about the different layers of the Earth. Pick your favorite layer and share with your table partners.
Everyone must share their favorite!

29. Layers of the Earth activity - Your choice! Pg 7 LS (IN CLASS ACTIVITY)
Earth drawing:
Step 1: Color in and label the Inner Core
Step 2: Color in and label the Outer Core
Step 3: Color in and label the Mesosphere
Step 4: Color in and label the Asthenosphere
Step 5: Color in and label the Lithosphere
Informational handout: Draw your own layers of the Earth and put them in the correct order. Include information about each layer.

30. Cartoon Pg 8 LS (IN CLASS ACTIVITY)
Bubble Map Pg 9 LS (IN CLASS ACTIVITY)
Draw a full page cartoon about the layers of the Earth.
You can choose one layer or use all the layers.
Create a bubble map for the layers of the Earth
Layers
At least 1 Physical properties
At least 1 description of composition