Convection in the Air

Warm air ______.

• sinks
• rises

Warm air is _____.

• less dense than cool air
• more dense than cool air

Cool air is ______.

• less dense than warm air
• more dense than warm air

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 

Cool air sinking creates areas of _____ pressure.

• high
• low

Warm air rising creates areas of ______ pressure.

• high
• low

What causes wind to blow?

• Differences in longitude 
• Shock waves from clouds 
• Differences in air temperature and pressure 
• The rotation of the earth

Which term best describes how the earth's atmosphere is heated?

• Spirally
• Unevenly
• Circularly
• Kinetically

What creates the air pressure difference between the equator and the poles?

• the length of the seasons
• the amount of precipitation
• the duration of the solar year
• the uneven heating of the Earth's surface

When warm air rises, cools, and then sinks...

• radiation current 
• convection current 
• conduction current
• ocean current