Convection

When air is heated, what happens to its mass?

• increases

• decreases

• remains the same

Tags

NGSS.MS-PS1-4

When air is heated, its volume ____________.

• increases

• decreases

• remains the same

Tags

NGSS.MS-PS1-4

When air is heated, its density ___________.

• increases

• decreases

• remains the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

Which is the best position to place the heating element in an electric heater?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

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

• A

• B

• C

• D

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Some dye in a beaker of water is gently heated. Why are the streaks of dye seen in the water?

• The hot dye is a better conductor than the cool water.

• The hot dye is a better convector than the cool water.

• The hot water is less dense than the cool water.

• The hot water is denser than the cool water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In convection, WARM air

• Rises
• Sinks

Tags

NGSS.MS-ESS2-5

Can convection currents occur in a solid?

• No.

  just in a liquid and gas.

• Yes.

  In a solid, liquid, and gas.