Bellwork: Imagine traveling deep below the surface of the Earth; describe what you think you might see and feel.

This week’s MISSION! We will become earth scientists as we dive deep into the layers of the earth and explore what they are made of and investigate why the continents have moved so much since earth was created.

Supplies…. Who remembered to work on their Earth model project due Friday April 22? Please bring these in by Friday!

Discovery Ed Video…. We are about to watch a video that discusses the Earth’s interior…. As you listen to the video, write down 3 important facts you hear from the video into your notebook We will share these after the video… w/assetGuid/4D09EF7F-386A-4A82-823D- 70D23C6127DD w/assetGuid/4D09EF7F-386A-4A82-823D- 70D23C6127DD

“Earth’s Layers Foldable” Glue this into your interactive notebooks.

Write in notebook: The Earth is mostly composed of rock

Write in notebook: (3/4) of the Earth’s surface is covered by water (liquid water and frozen water)

Write in notebook: Composition of the Earth: 4 Distinct Layers: – Crust – Mantle – Outer Core – Inner Core

4 Layers of the Earth –which layer is most dense?

4 Layers of the Earth –which layer is least dense?

Increased density as we go to the center of earth The 4 layers have different densities which causes them to separate Least dense = crust Most dense = inner core

Video “A Journey Inside the Earth” (6.27 minutes) Journey inside the Earth

4 corners ….on a blank page! Draw this diagram in your notebook now…. Color Crust-blue Mantle-Yellow Outer Core-Orange Inner Core-Red Color lightly so the facts can be read CrustMantle Outer CoreInner Core

Write in notebook: The Earth’s Crust: (blue corner) Thin, solid outer layer Least dense layer 2 types: continental crust oceanic crusts » Oceanic Crusts: under the oceans More dense (because the ocean compresses it) Thinner » Continental Crust: under the continents Less dense Thicker Contains plates that move over time. The crust is composed of plates that slide around on top of the section below it. This section is very thin compared to other layers of Earth (between 5 and 25 miles thick) and it is very hard and rigid.

Write in notebook: The Earth’s Mantle: (yellow corner) below the crust Made of silicon, magnesium, iron, oxygen Has CONVECTION CURRENTS: Thick, hot, convective layer. This is the largest layer - about 1,800 miles thick! The mantle is made up of incredibly hot, semisolid rock (basically think of rock in a form sort of like pudding). This layer makes up about 2/3 of Earth's mass.

Write in notebook: The Earth’s Outer Core: (orange corner) Liquid layer made of nickel and iron Spins around the inner core Earth’s only liquid layer The Outer Core is so hot that it is entirely liquid. To give you an idea of how hot it is, Nickel becomes a liquid at 2,650 degrees F and iron melts at 2,800 degrees F!

Write in notebook: The Earth’s Inner Core: (red corner) Solid iron and nickel layer Densest layer The inner core + the Earth’s rotation, creates the Earth’s magnetic field. Although the temperature is higher, the nickel and iron here are in solid form because of the intense pressure that this layer experiences.

Now it’s time to get our hands dirty… You will be making your model now… Please follow along as we work together to create your model Remember these colors Inner core = red Outer core = orange Mantle = yellow Crust = blue

Music Video Mr. Lee “Layers of the Earth” Earth's Layers