Which statement best explains how wind is formed?

• Air is warmed by radiation and air flow increases as a result of the warming.
• Pressure decreases as a result of frictional contact with earth causing air to flow more freely.
• Unequal heating of the land causes air to flow from areas of higher pressure to areas of lower pressure.
• Coriolis effect

A cold air mass is moving toward a warm air mass, and nimbostratus clouds are observed in the sky. Which weather conditions are most likely?

• a cool, rainy day
• a warm, rainy day
• a cool, sunny day
• a warm, sunny day

A meteorologist predicts that a cold front and a high pressure system will arrive later in the day. Which type of cloud will most likely appear as a result?

• fog       
• stratus
• cumulus
• cumulonimbus

When a low pressure system moves into North Carolina, which kind of weather will most likely occur?

• cold and dry 
• clear and humid 
• fair and sunny 
• rainy and windy

When tropical air masses move into North Carolina, which most likely occurs?

• an increase in temperature
• an increase in air pollution
• an increase in atmospheric pressure
• an increase in the number of cirrus clouds

An air mass that forms over the warm water of the Gulf of Mexico will be _________ . 

• hot and dry
• cold and dry
• warm and moist
• cool and moist

Which type of air pressure do clear skies indicate?

• high pressure
• low pressure
• zero pressure 
• medium pressure

Warm air moves up and over a cold air mass in a _____________________________ . 

• warm front
• cold front
• stratus cloud
• cirrus cloud

Use the map to answer the following question. Which city is most likely to experience the cold front first?

• Athens
• Dayton
• Marietta
• Steubenville

Why is the temperature lower at night than during the day?

• There is less water in the air at night
• The temperature depends on energy from the sun
• Winds blow harder at night
• There are more clouds at night to block the sun's rays