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

Convection can take place in ____________.

• solids only.

• liquids only.

• liguids and gases only.

• solids, liquids and gases.

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

Which of the following is an application of convection?

• The movement of heat through a metal pan to the food.

• The use of ice box to keep drinks cool.

• The sea breeze that blows from sea to land.

• The use of wool blanket to keep the body warm.

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

In the process of convection, energy is transferred _________.

• because of temperature differences in a solid

• because of density differences in a liquid

• by the diffusion of molecules throughout a fluid

• by the vibration of molecules

Tags

NGSS.MS-PS1-4

Which of the following correctly shows the direction of convection currents in water?

• A

• B

• C

• D

Tags

NGSS.MS-ESS2-6

The way the heat is moving from the hot coffee is called...

• convection
• radiation
• insulation
• conduction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

Tags

NGSS.MS-PS1-4

What is convection ? (Choose all answers that apply)

• method of transfer of heat in fluids

• method of transfer of heat in solids

• transfer of heat due to movement of molecules

• transfer of heat due to vibration of molecules

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

Is sea breeze an example of convection currents ?

• Yes

• No

• Don't know

Tags

NGSS.MS-ESS2-6

What does heat do when convection currents are moving?

• Sinks

• Rises

• Stays in place

Tags

NGSS.MS-PS3-4