5th Grade NC Earth Science (Released)

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

Which best describes a characteristic of the jet stream?

• It forms a boundary between a cold air mass and a warm air mass.

• It creates the high winds around the eye of a hurricane.

• It forces the hot air along the equator to rise to areas in North America.

• It causes high pressure air masses to rotate clockwise.

Andy lives in the Southern hemisphere. What season does he most likely experience in August?

• spring

• summer

• winter

• autumn

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 tempertures

• clear skies and hot temperatures

• cloudy skies and rainy weather

• heavy snow and ice

What is the cause of rising surface temperatures of the Pacific Ocean, drought in the wester United States, and flooding on the Pacific coast of South America?

• the Gulf Stream

• the jet stream

• La Nina

• El Nino

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 will most likely result from a low-pressure weather system?

• warm temperatures

• cloudy conditions

• clear conditions

• cool temperatures

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 jet stream moves air masses from the Pacific Ocean across the United States.

• The warm air of the Gulf Stream causes air masses to move from the Atlantic Ocean to the Pacific Ocean.

Which has the greatest effect on wind speed?

• precipitation

• cloud cover

• wind direction

• air pressure

Which best describes why winds at the beach change direction between day and night?

• because the temperatures over land and over water change

• because warm air over land sinks and stays in place over land

• because cool air rises and is replaced by warm air from the ocean

• because cool air sinks and stays in place over land