8.25 Bell Ringer

1. 8.25 Bell Ringer • Create a KWL Chart about “Earth’s Layers”

2. Directions: Fill out at least 4 facts in the “Learned” column from the brainpop video http://www.brainpop.com/science/earthsystem/earthsstructure/ LAYERS OF THE EARTH

3. Standard • S6E5a. • Compare and contrast earth’s layers including temperature, density, and composition

4. How Many Layers Are There? • There are four layers of the Earth: - the crust- the mantle- the outer core- the inner core

5. Earth Layers K.I.M Chart

6. Crust • Density: The leastdense layer: Outermost • Thickness: The thinnest(32 km or 25 miles) layer • Temperature: The coolest layer • Composition: Mostly Oxygen (47%) and Silicon(28%) Connection Think, Pair, Share: If it is the top layer do you think it is the densest or least dense layer?

7. What Does Crust Look Like? • A lot of the crust is hard to see because it is covered by soil, rock and water • Anywhere you can see rock, you are seeing the crust of the Earth!!!

8. What could we compare the crust of the Earth to? • Example: It is similar to the peel of an apple in the sense that it is thin and covers the outside of the Earth Think Pair Share—any other ideas?

9. Continental Crust • Makes up continents • Light rocks, such as granite • Thickerthan ocean crust Granite--

10. Oceanic Crust • Makes up ocean floor • Contains dense rock, such as basalt • Sinks below continental plates • Thinner than continental crust Basalt--

11. Crust Review: • Location: • Temperature: • Density: • Made up of: • Thickness:

12. Mantle • Density: More dense than crust: Beneath crust • Thickness: The thickest layer (1800 miles) • Temperature: 870-4,400 degree Celsius; 2nd hottest • Composition: Mostly oxygen (44%), Silicon (21%), Magnesium (22.8%) • Viscous: Mostly Solid, Oozy

13. What could we compare the Mantle of the Earth to? • Example: It is similar to the white part of an apple in the sense that it is the thickest part Think Pair Share—any other ideas?

14. Mantle • The Mantle is HOT (870-4400 degree Celsius!) • At this temperature the rock begins to melt making the Mantle thick and oozy! • Mantle is what bursts out of volcanoes • Ellen video

15. Mantle Review: • Location: • Temperature: • Density: • Made up of: • Thickness:

16. Lithosphere • Made up of crust and very top of mantle • Floats on top of the asthenosphere and slides around slowly • Broken up pieces are called “tectonic plates”

17. ASTHENOSPHERE • Hotter, softer layer of rock on which the lithosphere rests • Contains convection currents (mantle is constantly rising and sinking)

18. What could we compare the Core of the Earth to? • Example: It is similar to the seeds or core of an apple in the sense that it is the center and the hardest/densest part. Think Pair Share—any other ideas?

19. Outer Core • Density: More dense than mantle • Composition: Iron & Nickel • Thickness: 1400miles thick • Liquid • Responsible for magnetic field

20. Inner Core • Density: Most dense layer • Composition: Iron & Nickel • Thickness: 800 miles • Temperature: Hottest layer • Solid • So much pressure that despite the hot temperature that would melt the rocks it stays solid.

21. Core Review: • Location: • Temperature: • Density: • Made up of: • Thickness: http://www.earthmamasworld.com/homeschool-learning-discovering-the-layers-of-the-earth/

22. 8.26 Bell Ringer

23. Layers of the Earth Rap

24. On back/left hand side of notes draw and label the Earth you see in your hand

25. On back side of notes draw and label the Earth you see in your hand Crust Mantle Outer Core Inner Core

26. Earth Layers Tree Diagram

27. Bell Ringer The Earth is like an egg. Explain this analogy by relating each part of a peach (each layer—shell, egg white, yolk) to each layer of the Earth. • Write your claim and evidence (why does each layer represent the each part of the egg)

28. Layers of the Earth Rap

29. Earth’s Layers

30. Bell Ringer • Which cross-section shows the correct thickness of Earth’s layers? Write your claim and evidence.

31. Stations 1. Hand-On: Earth’s Layers Foldable 2. Teacher Directed: Earth Layers Reading 2. Technology: Georgia Virtual Learning

32. EARTH’S LAYERSFOLDABLE Please listen carefully to the following instructions

33. Materials • Coloring pencils/Crayons • Scissors • Glue • Earth’s Layers Foldable Handout

34. Step 2 Color the Earth Layers Picture • Inner Core- RED • Outer Core-PINK • Lower Mantle-ORANGE • Middle Mantle-LIGHT-ORANGE • Upper Mantle-YELLOW • Oceanic Crust- DARK BROWN • Continental Crust- LIGHT BROWN • Ocean - BLUE

35. Step 3 • Information: Fill out the 4 boxes using information containing the composition, state of matter, and thickness of each layer from your notes or book.

36. Step 3 continued…. • The Mantle • Composition: The mantle is made of… • Thickness: The thickness of the mantle is about…km • State of matter: The state of matter of the mantle is a liquid/solid

37. Step 4: Cut and Glue • Cut out the picture of the (colored) earth layers and glue it in your notebook. Label the page “Earth Layers Model” in your notebook. • Cutout the 12 labels and correctly glue them on each layer. • Cutout the 4 information boxes and glue them next to (right, left, above or below) the layers in your picture.

38. Earth’s Layers

39. Match term with pictures and definition. When finished, raise your hand. Copy into notebook when correct. • When finished, finish homework (Earth Layers Foldable and Questions)