Convection Review

Convection Review

Open Ended

What are the three types of heat transfer?

Multiple Choice

Convection is heat transfer through a __________.

• Liquid

• Solid

• Fluid

• Gas

Multiple Select

Which molecules are more dense - hot or cold?

• Cold

• Hot

Convection inside Earth

The heat to make convection happen in the mantle comes from the CORE of the Earth.

Think about this...

If the heat comes from the core, where would the mantle be the hottest?

By the core of course...the bottom of the mantle gets heated up by the core, rises and cools as it gets closer to the crust. Eventually it sinks back down only to get heated again.

Multiple Choice

What is the hottest part of the mantle?

• The bottom, near the core

• The top, near the crust

• The middle

Open Ended

And what happens to the molecules when the bottom of the mantle gets all heated up?

Reading a diagram

The letters in this diagram are to point out different parts of the mantle. For example, C and D are at the bottom of the mantle, and A and B are at the top

The arrows show you how the convection current is moving in the mantle. For example, it shows the convection current goes up at point D and down at point B.

Multiple Choice

What happens to the TEMPERATURE of the mantle between point A and B?

• Increases

• Decreases

Multiple Choice

What happens to the ENERGY of the mantle between point A and B?

• Increases

• Decreases

Temperature and Energy

Both the temperature and energy decrease between point A and B. This is because they aren't getting any more heat, which is energy! As the mantle cools down, it also loses energy and becomes more dense, making it sink at point B, back down towards the core.

Open Ended

Why does the convection current sink at point B?