Chapter 12 Earth's Atmosphere Lessons 1 and 2
Where do the Auroras occur?
Ionosphere
What does the ionosphere have to do with AM radio waves?
It reflect the waves
What makes up 78% percent of the atmosphere
Nitrogen
What makes up 21% of the atmosphere
Oxygen
What makes up 1% of the atmosphere?
Ozone, Water vapor, Carbon dioxide, and Argon
Atmosphere
A thin layer of gases surrounding Earth
Radiation
The transfer of energy by electromagnetic waves
convection
The transfer of thermal energy by the CIRCULATION or movement of a liquid or gas
Ionosphere
a region within the mesosphere and the thermosphere that contains ions; RADIO WAVES are reflected; AURORAS occur here.
What happens to air pressure as altitude increases?
air pressure decreases
Troposphere
atmospheric layer closet to Earth's surface
Ozone layer
atmospheric layer in which ozone gas is relatively concentrated; PROTECTS life on Earth from harmful ultraviolet rays in sunlight
Why is the ozone layer important?
blocks us from harmful UV (Ultra violet) rays
stabiltiy
describes circulating air to be strong or weak in the atmosphere
When is Auroras best seen?
during winter skies at night
The atmosphere gases carbon dioxide, water vapor and methane trap Infrared radiation causing
greenhouse effect
temperature inversion
layer of cooler air is trapped by a layer of warmer air above it
process
ordered series of actions
Air pressure
pressure that column of air exerts on anything below it
How does earth not overheat?
radiation balance
Stratosphere
the atmospheric layer directly above the troposphere containing the OZONE layer
latent heat
the energy absorbed or released during a change in state; water - changing between solid, liquid, gas
Exosphere
the outermost region of a planet's atmosphere.
conduction
the transfer of thermal energy by COLLISIONS between particles of matter (touch)
thermosphere
thicker layer than other layers of the atmosphere; home to the International Space Station and also low Earth orbit satellites.
reflect
to bend or throw back light, heat, or sound after striking a surface