Clouds
What is a combination of tiny water droplets
cloud
Rain, hail, snow are all examples of what?
precipitations
78% of the atmosphere is what gas?
nitrogen
the boundary when two air masses meet?
Front
How does water get from Earth’s surface into the air
evaporation
How do clouds form?
Condensation
The changes in air pressure makes ________.
Wind
What happens to the air temperature as altitude increases?
decreases in the troposphere
a warm air mass moves over a cold, denser air mass
warm front
What is the amount of water vapor in the air is known as
humidity
What are the type of clouds that form in layers?
stratus
The percent of thunderstorms that produce tornadoes
1%
The energy directly from the sun in the form of electromagnetic waves
radiation
A cold air masses moves under a warm less dense air mass
cold front
What are air pollutants formed from natural sources and human sources called?
primary pollutants
Type of cloud found at high altitudes and form when the wind is strong
cirrus
The two main characteristics of air masses
moisture
temperature
Troposphere
stratosphere
_________
Thermosphere
Mesosphere
A warm air mass is caught between two colder ai masses
occluded front
When was the Clean Air Act passed?
1970
Have flat bottoms and often indicate fair weather
cumulus
List one type of air mass
CT
MT
CP
MP
layer of atmosphere that protects from ultraviolet rays
ozone
What type of weather does a warm front typically bring?
stratus clouds, drizzly rain for a long time then clear warm skies
The condition of the atmosphere at a certain time and place
weather