Section #: 25.3
Air Resources
Practice Test
1.
What part of this township shown in the map can negatively impact the air resources?
a.
river
b.
gravel pit
c.
woods
d.
highway
Hint
2.
How is oxygen released into Earth's atmosphere?
a.
burning fossil fuels
b.
photosynthetic plants
c.
burning forests
d.
volcanic eruptions
Hint
3.
Oxygen makes up __________ percent of Earth's air.
a.
73
b.
21
c.
80
d.
12
Hint
4.
What is an example of natural air pollution?
a.
acid precipitation
b.
carbon monoxide from engine exhaust
c.
smoke from forest fires
d.
dust from desertification
Hint
5.
Oxygen __________.
a.
has not always been a part of Earth's atmosphere
b.
is released by volcanic eruptions in large quantities
c.
has been in Earth's atmosphere for the past 4.6 billion years
d.
was used up by early life-forms during photosynthesis
Hint
