Convection Review

Convection occurs in ______. (Select all that apply)

• Solids

• Liquids

• Gases

Tags

NGSS.MS-PS3-4

The cooling unit in this refrigerator is at the top. What aspect of convection makes this a good idea?

• Cold air is more dense so it rises.

• Warm air is less dense so it sinks.

• Cold air is more dense, so it will pull the warm air down with it.

• Warm air rises, so it will hit the cooling unit and then drop back down.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Cold fluids (gas and liquids) are (a)   dense.

Tags

NGSS.MS-PS1-4

Warm fluids (gases and liquids) are (a)   dense.

How does convection occur inside of this boiling water?

• Warm water rises to the top.

• When the warm water reaches the top, it starts to cool down.

• Cold water sinks to the bottom.

• When cold water reaches the bottom, it is heated by the stove.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Molecules that have been heated....

• stay still.

• move faster.

• become magma.

• get closer together.

Tags

NGSS.MS-PS1-4

Molecules that have been cooled....

• move faster.

• move farther apart.

• sink deep into the ocean.

• move slower.

Tags

NGSS.MS-PS1-4

Select all examples of convection.

• Convection oven.

• Water circulating in the ocean.

• Steam rising from a cup of tea.

• A bowl heated in a microwave.

Tags

NGSS.MS-ESS2-6

Convection does not occur in _______.

• solids

• liquids

• gases

• fluids.

The sun is in the center of the solar system because it has more ______ and gravity.

• volume

• mass

• density

• heat

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4