Science Review

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.

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

• the Gulf Stream
• the jet stream
• El Nino
• La Nina

Which has the greatest effect of 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
• rainy
• snowy

In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem?

• The ecosystem will become overpopulated with snakes.
• There will be a decrease in the population of snakes in the ecosystem.
• The nutrition of the soil in the ecosystem will decrease
• More types of plants will begin growing in the ecosystem.

Which gets all its energy from the sun?

• consumer
• producer
• decomposer
• no living organism

How are lakes and estuaries similar?

• They both have salt water.
• They both have freshwater.
• They both are located in the same area.
• They are not the same.

How are the tropical rain forest and pond ecosystems similar?

• They both have large amounts of trees.
• They both have producers and consumers.
• They both have the same plants and animals.
• They are not the same at all.

Which ecosystem would most likely contain fish that can only survive in freshwater?

• lake
• estuary
• ocean
• outer space