Science Review - Air Pressure

Which is the best explanation for how air masses move across the United States?

• The prevailing westerlies move air masses from west to east across the United States but may be deflected by the Jet Stream. 
• The trade winds move air masses from west to east across the United States. 
• The warm air of the Gulf Stream causes air masses to move from the Atlantic Ocean to the Pacific Ocean. 

The weather forecast indicates that a warm front will be moving into the area in the next 24 hours. Which type of weather will most likely result?

• clear skies and cold temperatures
• clear skies and hot temperatures
• cloudy skies and rainy weather
• heavy snow and ice

Which has the greatest effect on wind speed?

• precipitation
• cloud cover
• wind direction
• air pressure

On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the next 24 hours. Which weather conditions will this system most likely bring to the area?

• stormy
• sunny
• snowy
• hot

What will most likely result when the jet stream moves south of North Carolina?

• North Carolina will experience tropical weather conditions.
• North Carolina will experience hot, dry weather.
• North Carolina will experience mild weather.
• North Carolina will experience cold weather. 

Which correctly compares low- and high-pressure weather systems?

• A low-pressure system usually brings cool dry air and clear skies, while a high-pressure system brings clouds and precipitation. 
• A low-pressure system usually brings clouds and precipitation, while a high-pressure system brings cool dry air and clear skies.
• A low-pressure system usually brings warm dry air and clear skies, while a high-pressure system usually brings warm moist air and precipitation. 

Which has the greatest effect on the movement of the jet stream?

• size of clouds
• amount of precipitation
• differences in air temperatures

Michael observes the air pressure daily. Over the last couple of days the air pressure has been dropping. What weather will Michael most likely observe as a result?

• increasingly clear skies and more wind
• increasingly clear skies and dry weather
• increasingly cloudy skies and possible storms

Aliyah observes the air pressure daily. Over the last couple of days the air pressure has been increasing. What weather will Aliyah most likely observe as a result?

• increasingly clear skies and dry weather
• increasingly clear skies and more wind
• increasingly cloudy skies and dry weather

Which best describes why wind movement is predictable?

• Air moves from areas of low altitude to areas of high altitude.
• Air moves from areas of high pressure to low pressure.
• Air moves from areas of low pressure to high pressure.