Unit 6: Atmosphere, Weather and Climate

Which human activity has contributed to the formation of the hole in the ozone layer?

• use of chlorofluorocarbons

• destruction of rain forests

Which layer the atmosphere absorbs most of the ultraviolet rays?

• Stratosphere

• Troposphere

Which activity affects the ATMOSPHERE MOST?

• using oil as fuel for trucks

• spraying oil on dirt roads

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 high pressure under it.

What are the conditions that permit hurricanes to form over oceans?

• Ocean water is warm and heats the air above it

• Ocean water is cool and cools the air above it

What is the highest layer of the atmosphere where auroras occur?

• thermosphere

• troposphere

Which environmental factors MOST likely impact the formation of tornadoes in Tornado Alley?

• cool dry air colliding with warm moist air

• cold dry air and warm dry air moving toward each other

Air mass 1 would MOST likely bring which weather conditions to a region?

• cool and dry

• cool and humid

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

• density differences

• thermal conductivity

As altitude increases what happens to air pressure?

• Decreases

• Increases