Earth's Atmosphere
This force pulls the gasesin the atmosphere toward Earth
What is gravity?
When a cool, dense air mass replaces a warm air mass.
What is a cold front?
The most common type of precipitation is
What is rain?
This plays a major role in the water cycle
What are clouds?
the layer of gases that surround Earth
What is atmosphere?
This is where humans and animals live, airplanes fly, and most weather happens.
What is the troposphere?
when a warm, less dense air mass replaces a cold air mass
What is a warm front?
The opposite of evaporation
What is precipitation?
uniform and flat, producing a gray layer of cloud cover
which may cause periods of light precipitation.
What are stratus clouds?
a large body of air that has the same temperature and humidity throughout
What is air mass?
This layer gets its heat from the ozone layer, an invisible layer of protective gases
that circle Earth absorbing radiation from the sun
What is the STRATOSPHERE?
when cool, dry air circulates clockwise, forcing air down.
What is a high pressure system?
precipitation in the form of small balls
or lumps of ice and snow formed in high storm clouds
What is hail?
puffy, white
clouds seen during fair weather
What are cumulus clouds?
the temperature at which water begins to condense
What is dew point?
It is much colder in this layer and keeps getting colder as you move up.
What is the mesosphere?
when warm, moist air circulates counter-clockwise, forcing air upward.
What is a low pressure system?
precipitation that freezes or refreezes as it approaches the ground
What is sleet?
precipitation clouds.
What are nimbus clouds?
a type of physical change in which a substance changes from a gas to a liquid
What is condensation?
Thi layer is constantly hit with UV rays from the sun
What is the thermosphere?
when two fronts meet, but neither are strong enough to take over.
What is a stationary front?
Sleet and snow occur when the air near the
ground is at this temperature
What is 32 degrees F or below?
high-level clouds
What are cirrus clouds?
the lowest region of Earth’s atmosphere
What is the troposphere?