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8E.1.2 Hydrosphere 2
Test Description: 8.E.1.2
Instructions: Answer all questions to get your test result.
1) Which technological tool uses a sound echo to measure distance?
A
ocean buoy
B
sonar
C
submarine
D
robotic probe
2) Which best explains what happens to nutrients in the ocean as a result of upwelling?
A
Upwelling carries nutrients to the ocean bottom.
B
Upwelling carries nutrients to the intertidal zone.
C
Upwelling carries nutrients to the surface of the ocean.
D
Upwelling carries nutrients to coral reefs.
3) Which best describes the water in an estuary?
A
frozen
B
salt
C
brackish
D
fresh
4) Which best explains why estuaries are productive ecosystems?
A
They have high levels of dissolved gases.
B
They have high saltwater content.
C
They receive nutrients from both rivers and the ocean.
D
They receive chemicals from commercial and industrial runoff.
5) Which characteristic distinguishes an estuary from other bodies of water?
A
animal life
B
plant life
C
dissolved oxygen
D
salinity level
6) Which characteristic of an estuary makes it a good nursery area for marine organisms?
A
It has the ability to absorb water and prevent flooding.
B
It is located at the mouth of a river.
C
It has many areas to hide from predators.
D
It has a mix of salt and fresh water.
7) How does sonar technology help scientists monitor the hydrosphere?
A
Sonar distributes satellite images for data collection.
B
Sonar determines different levels of water quality in rivers.
C
Sonar provides detailed images of small areas of the ocean floor.
D
Sonar collects information from freshwater organisms.
8) Which best explains the importance of estuaries?
A
Estuaries are tropical areas that support an abundance of life found usually in cold regions of the
B
Estuaries are areas where freshwater and salt water collide, resulting in a large amount of biodiver
C
Estuaries are freshwater areas that support a large amount of living things.
D
Estuaries are nutrient-rich areas because they have large amounts of carbon dioxide seeping into the
9) Which best explains the effects of a hurricane on estuary circulation and salinity?
A
Salinity concentrations stay stable for a week after a hurricane.
B
Salinity quickly increases during a hurricane and then sharply decreases.
C
Surface salinity drops within a few hours of a hurricane passing.
D
Salinity levels remain the same as before the hurricane.
10) Which would be the impact on the environment if there were no estuaries?
A
There would be more pollutants in the oceans.
B
There would be a drought.
C
There would be less boating, fishing, and swimming in local rivers.
D
There would be a decreased concentration of salt in the oceans.
*select an answer for all questions
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