Show:
Air Around You
Air Quality
Air Pressure
Layers of the Atmosphere
Misc.
100
particles
In addition to gases, air also contains what?
100
motor vehicles
Where does nearly half of the pollution caused by humans come from?
100
millibars
What is the unit called that the National Weather Service uses to measure air pressure?
100
exosphere
What is the first layer of the atmosphere that an astronaut passes through during reentry from space?
100
acid rain
What is it called when precipitation contains more acid than normal?
200
water vapor
What is the atmospheric gas that forms clouds when it condenses?
200
sunlight
Photochemical smog results from the interaction of pollutants in the presence of what?
200
air has mass
Why does air in the atmosphere have pressure?
200
troposphere, stratosphere, mesosphere, thermosphere
What are the main layers in the atmosphere in order from Earth to space?
200
oxygen
What is the second most abundant gas?
300
nitrogen
What is the most abundant gas in the atmosphere?
300
pollutants
What are harmful particles and gases in the air?
300
air pressure
What is the weight of a column of air pushing on an object called?
300
ionsphere
What layer does radio waves reflect back to Earth?
300
weather
What is the condition of Earth's atmosphere at a particular time and place called?
400
ozone
What is the name of the molecule that is made up of three oxygen atoms?
400
pollen
What is a fine powdery material produced by plants?
400
barometers
What instruments are used to measure air pressure?
400
liquid form
What form does water exist on Earth due to the atmosphere trapping solar energy?
400
barometer
What is used to measure air pressure?
500
carbon dioxide
What is the atmospheric gas that animals produce, which plants need to live?
500
burning of fossil fuels
What is the human activity that causes the most air pollution?
500
there is less oxygen in each cubic meter of air
Why do you get out of breath when climbing a mountain?
500
aurora borealis
What is the brilliant display of lights or Northern Lights called?
500
ozone
What is a form of oxygen with three oxygen atoms in each molecule?