How does air move?

• Warm air rises and cool air sinks
• Warm air sinks and cool air rises 

What kind of weather would you expect in a low pressure system?

• Warm temps
• Cool temps
• Clear conditions 
• Cloudy conditions 

Why do we have winds on Earth?

• Because of the trade winds
• Because of Earth's orbit around the Sun
• Because earth receives the sun's rays unevenly 

What kind of season would you experience in the Northern Hemisphere in December? 

• winter
• summer
• fall
• spring 

What kind of season would you experience in the southern hemisphere in December?

• winter 
• spring
• summer 
• fall

Which characteristic best describes the jet stream?

• Rotates air in a high pressure system
• It separates air from the equator
• It forms a boundary between cold and warm air masses
• It is the air around a tornado funnel 

Above a continent, a warm air mass slowly passes over a cold air mass. As the warm air begins to cool, clouds form. What will most likely happen next?

• Rain wil fall
• Hurricanes will form
• Lightning will strike
• Hail will form 

This is the day to day change in temperature, precipitation, wind and air pressure 

• climate
• weather
• atmosphere
• wind 

water that falls to the earth

• evaporation 
• precipitation 
• transpiration 
• condensation 

Where 2 air masses meet is called ______?

• maritime
• low pressure
• front
• high pressure