01
Choose one
1 point
Which outcome can follow when water evaporates from the ocean into the atmosphere?
Free Practice Quiz Question List
7 Oceans and Climate Online Quiz Questions
Use this free practice quiz with 20 questions to review 7 Oceans and Climate, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
The ocean absorbs excess heat, and currents and mixing transport some of it downward. What is one consequence of this downward transport?
- A
They immediately release all the stored heat into the atmosphere.
- B
They carry some heat below the surface, delaying its release to the atmosphere.
- C
They turn heat into dissolved carbon dioxide.
- D
They prevent the ocean from absorbing excess energy.
03
Choose one
1 point
A region of seawater warms while other conditions remain similar. Which change in its exchange of CO₂ with the atmosphere is consistent with the material?
- A
Warming always increases the amount of CO₂ seawater can hold.
- B
Warming has no possible effect on the ocean's CO₂ exchange with the air.
- C
Warming can weaken CO₂ uptake or promote release because warmer water holds less dissolved CO₂.
- D
Warming permanently converts all atmospheric CO₂ into oxygen.
04
Choose all
1 point
Select all the processes that can contribute to carbon entering or remaining in the ocean.
- A
Some atmospheric CO₂ dissolves in seawater or is converted into dissolved forms such as bicarbonate.
- B
All ocean carbon remains permanently at the sea surface.
- C
Phytoplankton absorb carbon through photosynthesis, and some organic matter sinks.
- D
Circulation and sinking water can transport carbon to the deep ocean, where it may remain for centuries or longer.
05
Choose all
1 point
As the ocean becomes more strongly stratified, which effects are supported? Select all that apply.
- A
It can make vertical mixing more difficult.
- B
It guarantees that oxygen becomes evenly distributed throughout the ocean.
- C
It can affect the movement of nutrients and oxygen.
- D
It always eliminates temperature differences between water layers.
06
True or false
1 point
A marine heatwave is a period of unusually high ocean temperature that can stress marine life.
- A
True
- B
False
07
True or false
1 point
Stronger ocean stratification makes vertical mixing easier.
- A
True
- B
False
08
Written response
1 point
What term describes the combination of chemical uptake, biological activity, and water circulation that moves carbon into and through the ocean?
09
Written response
1 point
Since the 1970s, the ocean has taken up more than what percentage of the excess heat added to the climate system by human activities?
10
Fill in the blank
1 point
Warm surface currents can carry tropical heat toward , moderating nearby coastal climates.
11
Fill in the blank
1 point
When the ocean takes up human-produced CO₂, seawater chemistry changes and its decreases.
12
Open ended
1 point
Explain how ocean circulation and mixing help the ocean regulate climate through heat and carbon storage. Include one example of how the ocean can also feed back on climate.
13
Choose one
1 point
A coastal region lies near a warm surface current that transports water from the tropics toward higher latitudes. What climate effect can this current have nearby?
- A
They carry cold polar water toward the tropics, preventing coastal temperatures from changing.
- B
They carry tropical heat toward higher latitudes, moderating nearby coastal climates.
- C
They stop the ocean from exchanging heat with the atmosphere.
- D
They cause all coastal regions to have identical rainfall.
14
True or false
1 point
True or false: Since the 1970s, the ocean has absorbed more than 90% of the excess heat added to the climate system by human activities.
- A
True
- B
False
15
Written response
1 point
What is the process called in which the ocean's uptake of human-produced CO₂ changes seawater chemistry and lowers its pH?
16
Choose one
1 point
A warm surface current carries tropical water toward a higher-latitude coast. Which climate effect is most likely near that coast?
- A
Nearby coastal temperatures become more extreme because the current removes heat from the air.
- B
Nearby coastal climates can be moderated as the current carries tropical heat toward higher latitudes.
- C
Nearby coastal climates become colder because warm currents increase vertical mixing everywhere.
- D
Nearby coastal rainfall stops because ocean currents prevent water from evaporating.
17
Written response
1 point
What term describes a period of unusually high ocean temperature that can stress marine life?
18
Choose one
1 point
As greenhouse-gas emissions warm the ocean, which direct effect of warmer seawater contributes to sea-level rise?
- A
Warming makes seawater contract, while melting ice reduces the amount of ocean water.
- B
Warming adds salt to seawater, which is the main cause of sea-level rise.
- C
Warming makes seawater expand, contributing to sea-level rise.
- D
Warming stops water from moving between the ocean and atmosphere.
19
Choose one
1 point
A region experiences ocean warming and stronger layering of water. Which change in oxygen availability is consistent with these conditions?
- A
Oxygen availability can decline in some waters.
- B
Oxygen availability necessarily rises in all ocean waters.
- C
Oxygen is converted entirely into dissolved carbon dioxide.
- D
Oxygen availability is unaffected because layering increases mixing.
20
Choose one
1 point
As warming strengthens ocean layering, what is the most likely effect on vertical exchange between surface and deeper water?
- A
It speeds vertical mixing by making surface and deep water more alike.
- B
It prevents currents from moving horizontally across ocean regions.
- C
It increases the production of oxygen in every layer.
- D
It makes vertical mixing more difficult, affecting the movement of heat and other substances.