1. Composition of Earth
The Earth’s Layers

2. So far…
I can list and identify the 3 types of rocks and explain how they are created
I can describe how the surface of the Earth is shaped by building up, weathering and erosion
I can identify the 3 layers of the Earth and their features
I can explain how and why plates move, the effects of their movement, and the difference between convergent, divergent, and transform plate boundaries
I can list and describe the three types of volcanoes
I can use evidence such as layers of fossils and sediments, current landforms, and tectonic movements as evidence of geologic processes that have changed the Earth’s surface

3. Bill Nye – Earth’s Crust

4. Do Now
4 minutes
Earth’s Layers Key Question: What is the earth made of? Initial Thoughts:

5. Evidence: Earth Foldable
Follow the “Make and Earth’s Layer’s Foldable” Guide
Color the layers using the KEY on the Guide
Inner Core – red
Outer Core – red-orange
Lower Mantle – orange
Middle Mantle Light Orange
Upper Mantle – yellow
Oceanic crust – dark brown
Continental crust – light brown
Ocean - Blue

6. Foldable Directions: Fill out the 4 Layer BOXES.
pages 177 in the Sciencesaurus and
pg 250 in the Red Earth Science book
PowerPoint – Earth’s Layers
Composition: What it’s made of
Thickness: in km
State of matter: solid, liquid, “plastic” (a solid that behaves like a liquid)
Cut and paste the layers AND labels onto your 2 sheets of folded paper.

7. When you’re done…
Fold your foldable in half and paste it into your journal.
Paste in worksheets to your journal.
Answer the questions.
Complete the lesson
DUE TOMORROW

8. The Layers of the Earth
© Copyright 2006.  M. J. Krech. All rights reserved.

9. The Layers
The Earth is composed of four different layers. The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow. The outer core and inner core are even hotter with pressures so great you would be squeezed into a ball smaller than a marble if you were able to go to the center of the Earth!

10. The Crust
The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans (oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust).

11. The Crust
The crust is composed of two rocks. The continental crust is mostly granite. The oceanic crust is basalt. Basalt is much denser than the granite. Because of this the less dense continents ride on the denser oceanic plates.

12. The Lithospheric Plates
The crust of the Earth is broken into many pieces called plates. The plates "float" on the soft, semi-rigid asthenosphere.

13. The Mantle
The Mantle is the Thickest layer of the Earth. The middle mantle is composed of very hot dense rock that flows like asphalt under a heavy weight. The movement of the middle mantle (asthenosphere) is the reason that the crustal plates of the Earth move.

14. The Lithosphere
The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere.

15. The Asthenosphere
The asthenosphere is the semi-rigid part of the middle mantle that flows like hot asphalt under a heavy
weight.

16. Convection Currents
The middle mantle "flows" because of convection currents. Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling and sinking again --repeating this cycle over and over.

17. Convection Currents
The next time you heat anything like soup or water in a pan you can watch the convection currents move in the liquid. When the convection currents flow in the asthenosphere they also move the crust. The crust gets a free ride with these currents, like the cork in this illustration. Safety Caution: Don’t get your face too close to the boiling water!

19. The Outer Core
The core of the Earth is like a ball of very hot metals. The outer core is so hot that the metals in it are all in the liquid state. The outer core is composed of the melted metals of nickel and iron.

20. The Inner Core
The inner core of the Earth has temperatures and pressures so great (4,000 degrees Celsius) that the metals are squeezed together and are not able to move about like a liquid, but are forced to vibrate in place like a solid.

21. Analysis Questions What layers make up the lithosphere?
What layers are not completely solid?
What layer can you find the convection currents?

22. Summary
What did you think about the earth’s composition before this lesson?
What did you learn about the earth’s composition from this lesson? (Minimum of 3 sentences!!!)
What are some further thoughts or questions you have about the earth’s composition?

23. Reflection
Free Choice

24. Big Idea
The Earth is made up of the crust, the mantle, and the core.

25. 4-21-14 Do Now Date Lesson 4/1 Rock Basics 4/3 Rock Cycle Vocab 4/15
Add the bottom lesson to your grades page:
Date
Lesson
Stamp
Section Check
4/1
Rock Basics
(stamped)
5/5
4/3
Rock Cycle
Vocab
3/3
8/8
4/15
Breaking it Down
4/17
Erosion: Case Studies

26. Do Now
Vocab Quiz Close your journal. This is not an open journal vocab quiz. Log on to skyward Find Vocab Quiz #1 Wait until I tell you to begin When done, get out your Bill Nye Video W.S. View today’s Google doodle (there are 5 different ones

27. Happy Earth Day!

28. Vocab Look up the words in the red book and sciencesauraus glossaries.
Cut & paste the definition to the correct vocab word.
When done, work on the IMOW and sketches using: pages 177 in the Sciencesaurus and pg 250 in the Red Earth Science book

29. Cosmos Quizes #5 & 6 Quiz #5 – “Hiding in the Light”
Write 3 facts you learned from this episode.
Quiz #6 – “Deeper, Deeper, Deeper Still”
Write 3 facts you learned from this episode
Quiz #7 – “The Clean Room” this FRIDAY

30.
4 minutes
Add a sketch and IMOW (In My Own Words) to the following vocab words:
Crust
Mantle
Core
Today: Finish foldable, Foldable question sheet, and Lesson