Because it contains the oxygen we need to breathe and protects us from UV rays
100
What holds down the atmosphere? (How come the gases in the atmosphere do not just go out into space?)
Gravity holds atmosphere down
100
Where do we get most of our heat/light from?
the sun
100
What is wind?
the movement of air caused by differences in air pressure
100
What is air pollution?
the contamination of the atmosphere by the introduction of pollutants from human and natural sources
200
What is the atmosphere made out of?
78% Nitrogen, 21%Oxygen, 1% other particles
200
there is high air pressure at sea level. True or False?
True
200
What is radiation? Give an example of radiation
the transfer of energy as electromagnetic waves. Example: the sun, a light bulb
200
Complete the sentence: Hot air is _________ dense than cold air. Hot air __________.
less. rises.
200
What are primary pollutants? Give examples of each
pollutants that are put directly into the air by human or natural activity. Examples of natural sources: dust, sea salt, volcanic gases. Examples of human sources: smoke, carbon monoxide.
in the troposphere, as altitude increases, air pressure increases. True or False?
False
300
What is thermal conduction? Give an example
the transfer of thermal energy through a material. Example: getting burnt after touching a pot on the stove
300
Cold air is ________ dense than hot air. Cold air ________.
more. sinks
300
What are secondary pollutants? Give two examples
pollutants that form when primary pollutants react with other primary pollutants. Example: smog, ozone
400
Layer of the atmosphere that contains living organisms. This is where weather occurs
trophosphere
400
in the stratosphere, as altitude increases, temperature increases. True or False
True
400
What is convection? Name two places on Earth where you see convection cycles occurring
The transfer of thermal energy by the circulation or movement of a liquid or gas. Convection cycles move plate tectonics. Convection cycles also create wind
400
There is one huge wind current going up and down the Earth. True or False?
False
400
Give two example of precipitation
rain, snow
500
Layer of the atmosphere where the ozone layer is located
stratosphere
500
The thermosphere has very low temperatures. True or False
False. It has very high temperatures
500
What is the greenhouse effect?
When energy from the sun gets into the Earth but is unable to leave due to a "blanket" of gases that surround the Earth. These gases trap heat making Earth's temperatures go up
500
What is the coriolis effect?
the apparent curving of the path of wind currents due to Earth's rotation
500
What is acid precipitation?
precipitation that contains acid from air pollution