Convection in Air and Water

Which statement is true?

• Both cold air and water rise; hot air and water sink.

• Both hot air and water rise; cold air and water sink.

• Hot air rises and cold air sinks; hot water sinks and cold water rises.

• Hot air sinks and cold air rises; hot water rises and cold water sinks.

The transfer of thermal energy by the circulation of a liquid or gas is...

• radiation

• density

• conduction

• convection

The atmosphere and ocean work together to move _________ around the earth.

• salt and ocean animals

• warm water

• sea breezes

• heat and fresh water

Air or water that is MORE dense has particles that are...

• more spread out

• closer together

• somewhere in between

Air or water that is LESS dense has particles that are...

• more spread out

• closer together

• stays about the same

Warm air or warm water...

• rises, is less dense, and moves faster

• sinks, is more dense, and moves more slowly

• rises, is more dense, and moves more slowly

• rises, is less dense, and moves more slowly

Cold air or water...

• sinks

• rises

• stays still

What causes warm air to rise?

• the fact that it's less dense than cold air 
• The fact that it weighs more than cold air 
• The fact that it has higher pressure than cold
• the fact that its more dense than cold air 

Tags

NGSS.MS-ESS2-6

NGSS.MS-PS1-4

What concept describes how warm air and cool air circulate to keep the temperature stable in the atmosphere?

• prevailing winds
• convection
• air pressure
• Coriolis effect

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Warm air is found at the ___________ and it ____________ because it is ___________________ than cooler air.

• poles, sinks, more dense

• equator, rises, less dense