Section #: 22.3
Formation of the Atmosphere and Oceans
Practice Test
1.
What substance in Earth's atmosphere protects organisms from UV radiation?
SC.D.1.4.1
a.
ozone
b.
methane
c.
ammonia
d.
water vapor
Hint
2.
__________ are rocks that have alternating bands of fine-grained quartz and iron oxides.
SC.D.1.4.4
a.
All Archean rocks
b.
Red beds
c.
Banded iron formations
d.
Sedimentary rocks
Hint
3.
What process is primarily responsible for the formation of Earth's oceans?
SC.D.1.4.4
a.
outgassing
b.
plate tectonics
c.
evolution
d.
sea-floor spreading
Hint
4.
Why don't Archean and Proterozoic rocks have iron oxides?
SC.D.1.4.4
a.
there wasn't any iron in rocks of that age
b.
there was too much iron to be oxidized
c.
there wasn't any free oxygen in the atmosphere
d.
there weren't any stromatolites at that time
Hint
5.
What was the original composition of Earth's atmosphere?
SC.D.1.4.4
a.
water vapor and methane
b.
hydrogen and helium
c.
nitrogen and carbon dioxide
d.
ammonia and hydrogen
Hint
