Unit 4 Test Review

Auroras occur where Earth’s magnetosphere traps high-energy particles in which region of the atmosphere?

• troposphere

• stratosphere

• thermosphere

• exosphere

Which gas accounts for the largest percentage of greenhouse gases in the atmosphere?

• carbon monoxide

• carbon dioxide

• nitrous oxide

• water vapor

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 precipitation

• an increase in air pressure

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

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

How does air density affect air pressure in a cyclonic storm?

• Warm air rises, creating an area of low pressure under it.

• Cool air rises, creating an area of low pressure under it.

• Warm air rises, creating an area of high pressure under it.

• Cool air rises, creating an area of high pressure under it.

The high winds and torrential rains of a hurricane can cause damage to cities and natural areas in its path. A hurricane is likely to gain the MOST strength when it travels over which of the following?

• cool ocean

• inland area

• salty ocean

• warm ocean

The average yearly rainfall for Miami, Florida is about 58 inches. During the year, Miami goes through a dry period where it receives very little rainfall. Which factor is MOST likely responsible for the dry period?

• cold air moving in from the north

• distance from the Gulf Stream current

• location of latitude north of the equator

• warm air moving in from the Atlantic Ocean

What is an air mass?

• a boundary between two fronts
• an area of air with the same temperature and humidity throughout
• a bubble of warm air that rises up
• a region of air with a changing temperatur

The words "maritime" and "continental" both describe the _____ of an air mass.

• temperature
• humidity