Convection Currents & Layers of the Earth

Earth's Layers

100

This is the top, thinnest layer of Earth that we live on

Crust

200

As you go deeper toward the center of the Earth, does the temperature, pressure and density increase or decrease?

Increase

300

Which layer of Earth is the most dense and which one is the least dense?

Most Dense: Inner Core

Least Dense: Crust

400

This is the only layer of Earth that is completely liquid metal.

Outer Core

500

Name the Earth's 4 layers in order from hottest to coolest.

Inner Core, Outer Core, Mantle, Crust

All About Crust

100

Name the two types of crust.

Continental Crust & Oceanic Crust

200

Which type of crust is thicker: continental or oceanic?

Continental

300

Which type of crust is denser and heavier: continental or oceanic?

Oceanic

400

True or False: The crust is the lease dense layer of the entire Earth.

True

500

Magma that shoots out of a volcano comes from this thick, hot layer right under the crust.

Mantle

Plates & Rock Layers

100

This hard, solid layer is made of the crust and the top part of the mantle. 

Lithosphere

200

This middle layer of the mantle is soft and flow like melted plastic

Asthenosphere

300

Tectonic plates are broken pieces of this hard layer

Lithosphere

400

Solid tectonic plates are able to move because they float on top of this soft, flowing layer

Asthenosphere

500

The inner core is super hot, but it stays solid instead of melting because of high amounts of what?

Pressure/Gravity

Convection Currents

100

Convection currents take place inside this layer of the Earth.

Mantle

200

Where does the heat come from that drives convection currents in the mantle?

The core

300

Hot mantle material rises until it hits this solid layer, which blocks it and forces it to go back down.

The crust

400

When mantle material cools down near the crust, it falls because its density becomes more or less?

More dense

500

When mantle material gets heated near the core, it rises because its density becomes more or less?

Less dense

Hot, Cold, Heavy, Light

100

Name the 4 main layers in order from least dense to most dense.

Crust, Mantle, Outer Core, Inner Core

200

Is the mantle material hotter at the bottom near the core or at the top near the crust?

At the bottom near the core

300

Heat from the core makes mantle material hot and ______ dense. (more or less)

Less

400

True or False: As mantle material moves up from the core to the crust, the material is heating up and becoming less dense

False. It is cooling down and becoming more dense as it reaches the crust. 

500

If you have two mantle rock samples, Sample A is cold and Sample B is hot, which sample is denser and will sink?

Sample A