Earth’s LayersThe Journey to the Center of the Earth

Project: Starts next week

Homework: form a group of 3or 4people from this class. Print out instructions for “Building Test” from

Edmodo (project website: Procedure tab). Get materials that you need (on website) Bring instructions and materials to class next

week Answer the questions in the PDF (#2a.b.c).

This is to be handed in next class BEFORE you begin building.

Rocks in Space

Can you dig to Mexico?

The Center of the Earth looks like…

The Journey to the Center of the Earth

What do you think the Center of the Earth looks like?

Like an Onion, Earth has many layers

Exercise A: Compare the Earth’s layers to another object with layers of similar thickness (but not an onion or another planet).

Earth is divided into 3 compositional (element similarity) layers

Crust MantleConvection moves themolten rock

Core

Exercise 1: In your notebook; draw what you think the crust , mantle, and core look like. Which layer is thickest? Which layer is thinnest?

Exercise 2: Write the elements next to the layer that it composes.Elements:- Iron and Nickel - Oxygen, Silicon, Aluminum - Magnesium, silicon, oxygen, aluminum

Layers of the Earth

Correct your answers in your notebook after watching the short video.

After correcting your drawing, watch the video again and write the distance (km) of each layer.

Is your drawing correct? Which layer is thickest?

Scientists can organize the Earth’s layers by physical properties.

There are 5 Physical (how a layer moves, state of matter of each layer) Layers.

There are 3 Compositional Layers (chemical make up, elements of each layer).

Earth’s Physical Layers(physical state, movement)

LithosphereCrust + upper mantle AsthenosphereSoft/weak rock. Plates move on this layer. MesosphereStrong rock mantle. Slowly moving rock. Outer CoreLiquid Inner CoreSolid and dense Exercise 3: In your notebook,

write the 3 compositional layers next to the physical layers.

CRUST

Mantle

Core

Distances (km) of each layer Pg. 197 in textbook

Physical

Lithosphere 150km

Asthenosphere 250km

Mesosphere 2550km

Outer Core 2200km

Inner Core 1230km

Compositional

Crust 30km

Mantle 2900km

Core 3430km

Exercise 5* if time*: Math Practice!Complete Pg. 197, #10 in your textbook or in your notebook.

Exit Quiz - take out phone and go to m.socrative.com. Type in : 52593or write answers on a piece of paper and hand in.

1.Which layer is the densest?a. Inner core b. outer core c. mantle d. crust

2. Tectonic plates move on the:b. Lithosphere b. mesosphere c. asthenosphere

3. In which layer does convection take place?c. crust b. mantle c. core

4. How do scientists know what the mantle is composed of?

a. They drill into the Earth. b. They study lava from volcanoes. c. They don’t know.