Unit 6 Chapter 18-19

Which gas is the most important for understanding atmospheric processes/

• oxygen

• water vapor

• nitrogen

• carbon dioxide

What does it mean when air is said to be saturated?

• when it has more than enough oxygen in it

• when it contains the maximum amount of water vapor that it can hold at that temperature

• when the dew point temperature is 10 degrees higher than the air temperature

• when the amount of water vapor as at 50%

What is relative humidity?

• the percent of cloud cover in the sky

• the amount of water vapor minus the amount of carbon dioxide in the atmosphere

• the humidity related to the amount of solar radiation for that day

• the ratio of the actual amount of water vapor in the air to the amount of water vapor that air temp can hold

Calculate the relative humidity given the following factors:

Actual amount of water vapor = 20g/kg

Amount of water vapor the air can hold = 40g/kg

• 20% RH

• 50% RH

• 40% RH

• 10% RH

Which has a greater water vapor capacity?

• cold air

• warm air

What forms when air rises and cools to it's dew point temp?

• clouds

• snow

• oxygen

• ozone

What process is considered a "Cold Cloud" precipitation process?

• Collision-Coalescence Process

• Evaporation Process

• Bergeron Process

• Thermal Process

What process is considered a "Warm Cloud" precipitation process?

• Collision-Coalescence Process

• Evaporation Process

• Bergeron Process

• Thermal Process

What is freezing rain?

• Rain that occurs and causes you to become cold

• Rain that falls during the winter months

• Rain that falls as a liquid, but hits the ground and instantly freezes

• Rain that falls as a solid but hits the ground and melts

What causes differences in air pressure?

• the seasons of the year

• the amount of cloud cover that day

• the Coriolis effect

• the differences in the heating of the surfaces of the Earth