Unit 6 science study guide

What MOST likely happens when a cold air mass comes into contact with a warm, moist air mass?

• The sky becomes clear.

• Rain or snow begins to fall.

• Cold air is pushed to high altitudes.

• Warm air is pushed to ground level.

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NGSS.MS-ESS2-5

Earth’s equator receives more direct sunlight than the regions to its north and south. This distribution of sunlight accounts directly for which phenomenon?

• the rotation of storm systems

• the westward deflection of equatorial winds

• the formation of calm “eyes” in the centers of cyclones

• the movement of rising air currents away from the equator

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NGSS.MS-ESS2-6

If an air mass develops over Region 1 which is northwest and over the ocean, what properties will it MOST likely have?

• hot and dry

• cool and moist

• cold and dry

• hot and moist

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High-pressure systems stop air from rising into the colder regions of the atmosphere where water can condense. What will MOST likely result if a high-pressure system remains in an area for a long period of time?

• fog

• rain

• drought

• tornado

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NGSS.MS-ESS2-5

What are the characteristics of maritime polar air masses?

• warm and humid

• warm and dry

• cool and humid

• cool and dry

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NGSS.MS-ESS2-5

The arrows on the map represent the movement of air masses across North America.

Air mass in Region 1 Canada, would MOST likely bring which weather conditions to a region?

• warm and humid

• cool and dry

• warm and dry

• cool and humid

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A stationary air mass over the Gulf of Mexico would typically be

• warm and dry.

• warm and humid.

• cool and dry.

• cool and humid.

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Convection currents are formed in the atmosphere when cold air pushes warm air upward.

Which property of the air is MOST responsible for the formation of convection currents?

• specific heat

• density differences

• thermal conductivity

• chemical composition

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NGSS.MS-ESS2-6

Which is most often a result of a warm air mass moving over a cooler air mass?

• a decrease in wind speed

• a decrease in cloud cover

• an increase in air pressure

• an increase in precipitation

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NGSS.MS-ESS2-5

Which has the greatest influence on wind speed?

• differences in the density of adjacent air masses

• differences in atmospheric nitrogen concentrations

• differences in atmospheric carbon dioxide concentrations

• differences in ozone levels in the stratosphere

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NGSS.MS-ESS2-6