Air pressure
areas of no air
Vacuums
a cloud that forms at the lowest altitude, along the surface of the ground
fog
measures the amount of precipitation
rain gauge
The boundary where the air masses meet
FRONT
The process where molecules of water vapor in the air become liquid water
CONDENSATION
This is the coldest layer in the atmosphere
Mesosphere
metric units of measurement on a barometer
millibars
these clouds are made almost completely of ice crystals
Cirrus
Determines wind direction
Wind Vane
Air masses that form over oceans
MARITIME
What are the most common types of precipitation?
RAIN
HAIL
SNOW
SLEET
FREEZING RAIN
This is the outer most layer
Exosphere
a large body of air with similar temperatures and air pressure
Air Mass
these huge dark piled clouds bring summer storms
cumulonimbus
instrument that measures air pressure
Barometer
The two characteristics scientists use to classify air masses
Temperature and Humidity
heating process by which a liquid changes into a gas
evaporation
This is the hottest layer
Thermosphere
What happens when the air pressure is rising?
weather gets better
Name 2 types of clouds that are low-level
- fog
- cumulus
- stratus
- nimbostratus
measure air temperature
Thermometer
Cold, dense air has a _________________ pressure, while warm, less dense air has a ___________ pressure.
HIGHER (cold, dense air)
LOWER (warm, less dense)
Name the three parts of the water cycle
EVAPORATION
CONDENSATION
PRECIPITATION
This layer contains the Ozone Layer
Stratosphere
Scientists who study the causes of weather and try to predict it
METEOROLOGIST
these puffy clouds with a flat bottom bring fair weather
cumulus
measures wind speed
anemometer
What type of air mass would form over the northern Atlantic Ocean?
A maritime polar air mass
the amount of water vapor that is in the air
Humidity
This is the layer where weather happens
Troposphere
Weather depends on what 4 elements?
Temperature, Wind, Air pressure, Precipitation
These clouds cover all or most of the sky and are a uniform dull, gray color
Stratus Clouds
measures the density of liquids
Hygrometer
Colliding air masses form four types of fronts. Name the four types of fronts.
Cold fronts
Warm fronts
Stationary fronts
Occluded fronts
the process of water soaking into the ground
infiltration
This layer contains the northern and southern lights
Ionosphere