ST Pretest 2.1
1. Which of the following does not return carbon dioxide to the
atmosphere?
(A)
(B)
(C)
(D)
Volcanic action
Rain
Respiration
Decomposition
2.
What would happen if carbon was not cycled in nature?
(A) There would be no photosynthesis.
(B) Climate would be disrupted.
(C) Dead shells and other detritus would just pile up.
(D) All of the above
3. Which of the following remove carbon dioxide from the atmosphere (known
as carbon sinks)?
(A)
Volcanoes
(B)
Industrial heating
(C)
Forest fires
(D)
Algae
4. From the point of view of their roles in the carbon cycle, what do rainwater and oceans have in
common?
Both dissolve carbon dioxide and convert it to carbonic acid.
H2O + CO2  H2CO3
5.
(A)
(B)
(C)
(D)
Which of the following gases was not found in the atmosphere a hundred years ago?
Argon
Nitrogen
Carbon dioxide
Freon-12
6. What is atmospheric pressure?
It is the weight of air acting on a unit area.
7. What role does atmospheric pressure play in allowing us to breathe?
When we inhale, the volume of our chest cavity increases, decreasing the pressure. Then, with
less hindrance, atmospheric pressure can push the air into our lungs.
8. What layer of the atmosphere is being described by Wikipedia?
a) It begins at the surface and extends to between 9 km (30,000 ft) at the poles
and 17 km (56,000 ft) at the equator, with some variation due to weather. It
is mostly heated by transfer of energy from the surface, so on average the
lowest part of this layer is warmest and temperature decreases with
altitude____troposhere_________
b)
Temperature increases with height due to increased absorption of
ultraviolet radiation by the ozone layer, which restricts turbulence and
mixing. While the temperature may be −60 °C (−76 °F; 210 K) at the
tropopause, the top of this layer is much warmer, and may be near
freezing_____stratosphere______________
c) The temperature of this layer can rise to 1,500 °C (2,700 °F), though the gas
molecules are so far apart that temperature in the usual sense is not well
defined. The air is so rarefied, that an individual molecule (of oxygen, for
example) travels an average of 1 kilometer between collisions with other
molecules.[3] The International Space Station orbits in this layer, between 320
and 380 km (200 and 240 mi)._______thermosphere_________________
d) It is the layer where most meteors burn up upon entering the
atmosphere.____mesosphere_________________