Convection

The diagram shows a refrigerator. The cooling unit is placed at the top. The cooling unit cools the air near it. What happens to the density of the air as it cools, and how does it move?

• The density of air increases. It moves down.

• The density of air increases. It moves up.

• The density of air decreases. It moves down.

• The density of air increases. It moves up.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In convection, COOL air

• Rises
• Sinks

In convection, WARM air

• Rises
• Sinks

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Warm air is __________ dense than cold air and rises creating convection currents.

• more
• less

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which picture shows material that is more dense?

• The picture of the left

• The picture on the right

What is the heat source for convection in the mantle?

• the Crust
• the Mantle
• the Core

 Where do convection currents happen in the model we are studying?

• the Crust
• the Mantle
• the Core

Convection currents affect the movement of plates on the Earth's crust.

• True
• False

Tags

NGSS.MS-ESS2-3

Where is the temperature of the mantle material greater, at point A or point B?

• Point A
• Point B

Tags

NGSS.MS-ESS2-1

NGSS.MS-PS3-4

Name the boundary

• convergent boundary
• divergent boundary
• transform boundary
• sergent boundary