Aquatic Ecosystems Quiz

What is the photic zone important for in aquatic ecosystems?

• It is where the sun comes into the water allowing photosynthesis to occur.

• It is the deepest part of the water where organisms live.

• It is the temperature regulation zone of the water.

• It is the area where water salinity is measured.

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What is an estuary?

• A place where a river meets the sea and contains many ecosystems.

• A small body of water completely surrounded by land.

• A large area of water that is often affected by tides.

• A zone in the ocean where sunlight cannot reach.

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NGSS.MS-ESS2-4

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Which of the following is NOT a factor that can affect a river ecosystem?

• Seasonal changes in water level.

• Geology of the water bed.

• The color of the water.

• Siltation and erosion.

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NGSS.MS-LS2-4

What is the optimum pH level for fish in aquatic ecosystems?

• 3.5 to 5.0

• 4.5 to 6.5

• 6.5 to 9.0

• 9.5 to 12.0

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NGSS.MS-LS1-5

What phenomenon occurs when too many nutrients are available in water, leading to harmful algal blooms?

• Eutrophication

• Acidification

• Desalination

• Photodegradation

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What role do plankton play in the aquatic food web?

• They are primary producers, creating energy from sunlight.

• They decompose and consume dead plant and animal material.

• They regulate the temperature of the water.

• They are responsible for the salinity of the water.

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Which organisms do zooplankton include?

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How does warm water affect aquatic life compared to cool water?

• Warm water holds more dissolved oxygen than cool water.

• Warm water holds less dissolved oxygen than cool water.

• Warm water has a higher salinity than cool water.

• Warm water is less toxic to aquatic life at higher temperatures.

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NGSS.MS-LS2-4

How does salinity affect the density of ocean water?

• Water with higher salinity is less dense and floats on top of less saline water.

• Water with higher salinity is denser and sinks underneath less saline, warmer water.

• Salinity has no effect on the density of ocean water.

• Water with higher salinity evaporates more quickly.

What can the movement of ocean currents be affected by?

• The color of the ocean water.

• The temperature of the ocean water only.

• The salinity and temperature of the ocean water.

• The presence of marine life.

Tags

NGSS.MS-ESS2-6