Chapter 5 Section 2 Convection and the Mantle

Heat from the _______________________ and ________________________ itself causes convection currents in the mantle.

core and mantle

What three processes or forces combine to set convection currents in motion.

1. Heating and cooling of fluid 2. Changes in a fluid's density 3. Force of gravity

Density

A measure of how much mass is contained in a given volume.

What is the result of convection currents moving the plates of the lithosphere?

Earthquakes, volcanic eruptions, mountains, etc...

Heat moves in what direction?

From a warmer to a cooler object

What is an example of radiation?

How energy from the sun heats Earth.

What is the effect of convection currents in the mantle?

The convection currents act as a conveyor belt moving the plates of the lithosphere.

Conduction

The direct transfer of heat from one substance to another substance by direct contact.

Convection Current

The flow that transfers heat within a fluid. This is happening in the mantle.

Radiation

The transfer of energy that is carried in rays like light , has no direct contact between the heat source and an object

Convection

The transfer of heat by the movement of a heated fluid (liquid and gases)

When an object is heated, what happens to its particles?

They move faster.

Which is more dense, a cool fluid or a warm fluid?

a cool fluid

What are the three types of heat transfer?

radiation, convection, and conduction