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Click on the button next to the response that best answers each question. Then click on the submit button below.
1. The atmospheric gas from which ozone is formed is
a.
oxygen.
b.
carbon dioxide.
c.
nitrogen.
d.
hydrogen.
2. The biggest single cause of air pollution is
a.
acid rain.
b.
forest fires.
c.
the burning of fossil fuels.
d.
volcanic ash and dust.
3. Which human activity is responsible for half of all air pollution?
a.
farming
b.
manufacturing
c.
building
d.
driving cars and other motor vehicles
4. Which of the following sets off chemical reactions that form photochemical smog?
a.
sunlight
b.
hydrocarbons
c.
nitrogen oxide
d.
ozone
5. The most abundant gas in Earth's atmosphere is
a.
oxygen.
b.
carbon dioxide.
c.
nitrogen.
d.
hydrogen.
6. As altitude increases,
a.
air pressure and density increase.
b.
air pressure and density decrease.
c.
air pressure increases and density decreases.
d.
air pressure decreases and density increases.
7. Earth's weather occurs in the
a.
thermosphere.
b.
mesosphere.
c.
stratosphere.
d.
troposphere.
8. Ozone is primarily found in the
a.
thermosphere.
b.
mesosphere.
c.
stratosphere.
d.
troposphere.
9. The ionosphere is the layer in which
a.
communications satellites orbit.
b.
the aurora borealis occurs.
c.
meteoroids burn up.
d.
ultraviolet radiation is absorbed.
10. Density is calculated by
a.
dividing volume by mass.
b.
dividing mass by volume.
c.
multiplying mass by volume.
d.
dividing pressure by mass.