Layers of Earth

Layers by their Chemical Composition Crust Mantle Core

The Crust Outermost, thinnest layer 5 to 100km thick Solid Two types: Continental and Oceanic Composition: Oxygen, silicon, and aluminum

The Mantle Between the crust and core 2,900km thick Thickest layer Solid but soft enough to flow through. No one has ever visited the mantle. Scientists observe Earth’s surface to conclude composition. Composition: Magnesium

Convection Currents: 1 possible cause of tectonic plate motion Like hot air rise, cool air sinks. Causes lithosphere to move sideways and away from the mid-ocean ridge.

The Core Below the mantle to the center of Earth Radius of 3,430 km Makes up 33% of Earth’s mass. Composition: Mostly iron, nickel Inner core is solid Outer core is liquid

Draw the layers of Earth based on chemical composition. Who can teach this?

Review!

This is the thickest layer. The Mantle This is the thickest layer.

We live on top of this layer. The Crust We live on top of this layer.

This layer is the thinnest. The Crust This layer is the thinnest.

This layer is made up of convection currents. The Mantle This layer is made up of convection currents.

This layer is the central part of the Earth. The Core This layer is the central part of the Earth.

Composed of Oxygen, Silicon, and Magnesium The Crust Composed of Oxygen, Silicon, and Magnesium

Group work! Step 1: Get into your groups. Step 2: Create a story about the 3 chemical layers of Earth. Step 3: This story should relate to the composition, state of matter, and thickness of the layer. Step 4: Create a picture that relates to the story. I am accepting one written copy of the story and one drawing per group.

Open those Science Books!!! Step 1: Find a partner Step 2: Get a science textbook Step 3: Describe the 5 physical layers of Earth by answering the following questions. Which layer is composed of tectonic plates? Which layer is the lowest part of the mantle? Which layer is the liquid layer? Which layer is made of solid rock?