What causes wind?

• convection currents
• conduction currents
• radiation currents
• tropical currents

Winds are caused by 

• equal heating 
• unequal heating

What is the instrument called that measures air pressure?

• thermometer
• ruler
• yard stick
• barometer

When air is heated, it will MOST likely

• expand and fall
• expand and rise
• condense and fall
• condense and rise

Why does warm air rise?

• Warm air is more dense than cooler air.
• Warm air has more pressure than cooler air.
• Warm air is less dense than cooler air.
• Warm air has a higher dew point than cooler air.

Which of these MOST likely causes winds to blow on Earth?

• Earth spins quickly, causing air to blow around.
• The gravity of Earth and the Moon push and pull the air.
• Warm air rises and cool air falls toward Earth's surface.
• Ocean waves push air onto the shore and across Earth's surface.

Which describes how wind speed if affected by weather?

• rainy weather causes greater wind speeds
• warmer weather causes greater wind speeds
• differences in air pressure cause greater wind speeds
• small temperature changes cause greater wind speeds

Which global winds have the greatest impact on the weather in the US?

• trade winds
• prevailing westerlies
• doldrums
• polar easterlies

In which direction do prevailing westerlies flow?

• from east to west
• from west to east
• from north to south
• from south to north

Which types of winds cause weather in North Carolina?

• polar easterlies
• prevailing westerlies
• polar westerlies
• prevailing easterlies