North Carolina Science Grade 8

Chapter 7: Oceans

Oceans

1.
Examples of recycling in an ecosystem include all of the following EXCEPT __________.
A)wave motion
B)respiration
C)excretion
D)the food chain
2.
Ocean water may have come from all of the following EXCEPT __________.
A)water vapor
B)torrential rains
C)volcanic eruptions
D)lava flows
3.
Warm surface currents run past all of the following areas EXCEPT __________.
A)Iceland
B)Florida
C)North Carolina
D)California
4.
The ocean and life within it provide all of the following EXCEPT __________.
A)large amounts of carbon dioxide
B)transportation of seeds, animals, and materials
C)70 percent of the oxygen on our planet
D)resources including food, medicines, and salt
5.
If density currents stopped forming, all of the following results may occur EXCEPT __________.
A)changing rainfall patterns
B)increasing temperatures
C)decreasing temperatures
D)increased upwellings
6.
Which of the following statements is NOT true?
A)Temperature decreases as depth increases.
B)Pressure decreases as depth increases.
C)Pressure increases as depth increases.
D)Temperature increases as depth decreases.
7.
Tides are caused by __________.
A)the rise and fall of water
B)strong winds
C)the gravitational attraction of the Sun and the Moon
D)changes in ocean salinity
8.
An ecosystem will contain all of the following organisms EXCEPT __________.
A)synthesizers
B)consumers
C)producers
D)decomposers
9.
Which of the following animals is NOT a nekton?
A)diatom
B)shark
C)dolphin
D)turtle
10.
Photosynthesis by organisms in the ocean results in the production of __________.
A)carbon dioxide
B)nitrogen
C)water
D)oxygen
11.
Shoreline erosion can be a result of all of the following EXCEPT __________.
A)longshore currents
B)density currents
C)waves
D)hurricanes
12.
Which of the gases from the atmosphere is not dissolved in seawater?
A)argon
B)nitrogen
C)carbon dioxide
D)oxygen
13.
Water is set in motion by __________.
A)wind
B)stationary objects
C)upwellings
D)the Coriolis effect
14.
Water currents in the ocean curve because of __________.
A)the Coriolis effect
B)wind
C)the Sun
D)upwellings
15.
Ocean currents that form when coastal waters are blown away from shore are called a(n) __________.
A)coastal current
B)surface current
C)upwelling
D)density current
16.
__________ distribute heat from one region to another.
A)Surface layers
B)Density currents
C)Surface currents
D)Density layers
17.
Energy is transferred from organism to organism through __________.
A)waves
B)food chains
C)producers
D)respiration
18.
Which of the following is NOT true of offshore ocean waves?
A)Floating objects rise and fall with the wave but do not move forward.
B)The water particles remain in the same place.
C)The energy of the wave continues to move forward.
D)Floating objects and water particles move forward.
19.
The temperature of a __________ quickly decreases as the depth increases.
A)surface layer
B)thermocline
C)syncline
D)deep water layer
20.
All food chains begin with __________.
A)decomposers
B)producers
C)consumers
D)composers
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