Of the following activities, which one reduces the concentration of carbon dioxide in the ...

Of the following activities, which one reduces the concentration of carbon dioxide in the atmosphere?
 A) respiration
  B) photosynthesis
  C) decomposition
  D) combustion
  E) volcanic activity

Question 2

Of the following gases, this one has the least effect on weather and climate
 A) nitrogen.
  B) carbon dioxide.
  C) ozone.
  D) water vapor.
  E) chlorofluorocarbons.

Question 3

Atmospheric nitrogen
 A) is highly reactive.
  B) owes its existence to the actions of micro-organisms.
  C) stays in the atmosphere for a long time.
  D) was mostly captured from outer space by the Earth's gravitational field.
  E) has a molecular weight that is higher than that of oxygen.

Question 4

The third-most abundant gas in Earth's atmosphere (not including water vapor) is
 A) oxygen.
  B) argon.
  C) nitrogen.
  D) carbon dioxide.
  E) helium.

Question 5

This was not a prominent gas in the Earth's early atmosphere
 A) methane.
  B) ammonia.
  C) hydrogen.
  D) helium.
  E) oxygen.

Question 6

This is the most fundamental reason why Earth currently has an atmosphere
 A) strong winds keep the atmosphere moving horizontally above the Earth.
  B) the Earth's magnetic field prevents gas molecules from escaping into space.
  C) the Earth's gravity is strong enough to prevent most gases from escaping into space.
  D) Earth's atmosphere is quite dense, and thus very viscous.
  E) the solar wind constantly adds gas particles to the atmosphere.

Question 7

Of the following, which is most relevant to weather?
 A) water
  B) rock
  C) carbon dioxide in the atmosphere
  D) particles in suspension in the atmosphere
  E) methane in the atmosphere

Question 8

Regarding meteorology and climatology, it is true that
 A) both involve study of the atmosphere.
  B) they examine fundamentally different aspects of the physical universe.
  C) weather can be thought of as the statistical representation of climate.
  D) a climatologist is more likely than a meteorologist to get a job at a local television station.
  E) none of the above