Unit 6: Earth's Atmosphere Test Review

Wind is caused by air flowing from

• high pressure to low pressure areas.

• low pressure to high pressure areas.

• a humid area into a dry area.

• areas of high convection to areas of low convection.

Answer explanation

Wind is caused by the movement of air from areas of high pressure to areas of low pressure. This pressure difference drives the flow of air, creating wind.

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An area where colder air molecules compress and push down on the Earth's surface with a heavy amount of force is called a

• low pressure area.

• high pressure area.

• cold pressure area.

• hurricane.

Answer explanation

A high pressure area occurs when colder air molecules compress and exert force on the Earth's surface. This is the opposite of a low pressure area, where air rises. Therefore, the correct answer is a high pressure area.

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NGSS.MS-ESS2-5

A cold and dry air mass is called-

• Arctic Polar

• Maritime Tropical

• Maritime Polar

• Continental Polar

Answer explanation

A cold and dry air mass is classified as either Arctic Polar or Continental Polar. Both types originate from high latitudes and are characterized by low moisture content and cold temperatures.

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When two air masses meet, the warm air will

• Go through the cold air

• Rise up over the cold air

• Go below the cold air

• Stay in place

Answer explanation

When two air masses meet, warm air is less dense than cold air, causing it to rise up over the cold air. This process is known as convection, which is why the correct answer is that the warm air will rise.

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NGSS.MS-ESS2-5

What type of pressure system represents fair weather?
Hint: Fair weather usually means clear skies and sunshine.

• No pressure

• Low pressure

• High pressure

• Stationary pressure

Answer explanation

High pressure systems are associated with fair weather, clear skies, and sunshine. In contrast, low pressure systems often bring clouds and precipitation, making high pressure the correct choice for representing fair weather.

What type of weather is headed toward Bynum?

• A. A thunderstorm with heavy rain and winds

• B. Fair weather with cooler temperatures

• C. Light to moderate precipitation that lasting for days

• D. Steady drizzle or mist

Answer explanation

The correct answer is A, as it indicates a thunderstorm with heavy rain and winds, which aligns with severe weather patterns often reported in Bynum. The other options suggest milder conditions that do not match the forecast.

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Sometimes weather forecasters talk about cold fronts and warm fronts to describe how the weather is changing. A front is --

• the beginning of a storm that brings strong winds, heavy rain, and tornadoes.

• a boundary where different air masses meet.

• an imaginary line that shows the location of different convection cells.

• the location in which two clouds collide, causing lightning.

Answer explanation

A front is defined as a boundary where different air masses meet. This interaction can lead to various weather changes, making this choice the correct answer.

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Look at the weather map. What kind of weather is Dallas, TX going to have tomorrow?

• It will be warmer, and it might rain.

• It will be cooler, and it might rain.

• It will be colder, and there might be snow.

• It will be warmer, and the skies will be clear.

Answer explanation

The weather map indicates that Dallas, TX will experience warmer temperatures with a possibility of rain, making 'It will be warmer, and it might rain' the correct choice.

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Based on the weather map below, which map shows the most likely path in which these two pressure centers will move over the next few days?

• 
• 
• 
• 

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The diagram below shows a student's model of the water cycle. In which layer of the atmosphere does the process shown actually occur?

• mesosphere

• stratosphere

• troposphere

• thermosphere

Answer explanation

The water cycle processes, such as evaporation and condensation, primarily occur in the troposphere, which is the lowest layer of the atmosphere where weather events take place.

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