Convection Currents of Earth

Convection Currents and the Mantle

3 Types of Heat transfer

• Radiation- transfer of heat through empty space

• Conduction- transfer of heat by direct contact

• Convection- transfer of heat involving the movement of fluids-liquids and gases

Multiple Choice

The transfer of heat by direct contact is ...

• radiation

• conduction

• convection

Multiple Choice

The transfer of heat through empty space is ...

• radiation

• conduction

• convection

Multiple Choice

The transfer of heat involving the movement of fluids-liquids and gases is ...

• radiation

• conduction

• convection

Asthenosphere

• Heat from Earth’s core and mantle cause hot columns of mantle material to rise

• Hot material spreads and forces the cooler material to sink 

Convection in the mantle begins when rock near the core is heated. This causes the rock to rise towards the surface of the earth. When it reaches the lithosphere it (usually) spreads out and begins to cool.

Multiple Choice

What is density???

• the amount of mass in an object

• the amount of volume it takes up

• the amount of mass in a given volume

As it cools, it begins to sink back towards the core, and the process starts over again.

Multiple Choice

What is the name of the process that causes hot rock to rise from the area near the Earth's core?

• Mantle Heating

• Convection Currents

• Convection Flow

• Magma Flow

Multiple Choice

When the rock in the mantle cools down, what happens to it?

• It makes a new island

• It sinks back into the lower part of the mantle

• It stays where it's at