Ocean Circulation — Unit test Answers

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1
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Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?

A
The plants undergo transpiration.
B
The plants undergo condensation.
C
The plants prevent water from evaporating.
D
The plants prevent water from becoming runoff.
2
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Sydney drew a flow chart to illustrate the nitrogen cycle.

Question illustration
X
X: Producers undergo photosynthesis.Y: Nitrogen compounds are released into the air.
X
X: Nitrogen compounds are released into the air.Y: Producers undergo photosynthesis.
X
X: Free nitrogen is in the atmosphere.Y: Producers absorb nitrogen compounds through their roots.
X
X: Producers absorb nitrogen compounds through their roots.Y: Free nitrogen is in the atmosphere.
3

A scientist observes a geyser erupting. Which two objects must be interacting beneath the surface?

A
well and spring
B
spring and magma
C
magma and groundwater
D
groundwater and unsaturated zone
4

Which describes one feature of deep ocean currents?

A
have lower-salinity water
B
carry warm water from the equator
C
have higher-temperature water
D
move more slowly than surface currents
5

In which direction does wave energy travel in the ocean?

A
up and down
B
north and south
C
with the currents
D
toward the shore
6

Which zone within the open-ocean zone is home to the most organisms?

A
deep zone
B
surface zone
C
intertidal zone
D
transition zone
7

Why is the unsaturated zone not filled with water?

A
It is below the water table and water stays above it.
B
It is clay and water pools above it.
C
It is granite and water flows around it.
D
It is permeable and water flows through it.
9

Which is one benefit that mangrove trees provide to surrounding coastal wetlands?

A
They hold soil in place.
B
They store floodwaters.
C
They maintain surface water flow.
D
They filter water and improve water quality.
12

Which organisms release carbon dioxide as waste?

c
consumers only
c
consumers and decomposers
p
producers and decomposers
p
producers only
15

Which part of the shallow ocean descends sharply away from the continental shelf?

A
abyssal plain
B
mid-ocean ridge
C
transitional zone
D
continental slope

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