Convection and the Mantle

Mrs. Wach

Sixth Grade (Chapter 1.3)

Heat is transferred in one of three ways.

1. RADIATIONThe transfer of

energy/heat that is carried in rays, like light.

2. CONVECTIONThe transfer of

energy/heat by the movement of a fluid.

3. CONDUCTIONThe transfer of

energy/heat between materials that are touching.

How Is Heat Transferred?

What Does It Look Like?

What Does It Look Like?

What Does It Look Like?

What Does It Look Like?

Convection Currents in Soup

https://www.youtube.com/watch?v=BPCV5mSyVQY

GRAVITY: Cooler soup become more dense. Gravity pulls soup back down to bottom of pot where it is reheated.

TOP: Warm, less dense soup moves upward. It become cooler.

MIDDLE: As soup expands, its density decreases.

BOTTOM: The soup at the bottom gets hot and expands.

Convection Current

CONVECTION CURRENTHeating and cooling of a fluid, changes in the fluid’s density, and the force of gravity combine to set convection currents in motion.

Inside Earth, heat from the core and the mantle act like the stove that heats the pot of soup.

Heat from the core and mantle itself causes convection currents in the mantle.

Convection in Earth’s Mantle

Convection in Earth’s Mantle

Convection in Earth’s Mantle

ANIMATIONhttp://maggiesscienceconnection.weebly.com/mantle-convection-plate-tectonics-earthquakes--volcanoes.html