Unit 4 - Deep Sea Test Review

What is the disphotic zone also called?

• The twilight zone

• The aphotic zone

• The bathypelagic zone

• The epipelagic zone

Answer explanation

The disphotic zone is also called the twilight zone, making it the correct choice among the options provided.

Tags

NGSS.MS-ESS2-6

What is turbidity a measure of?

• Depth

• Temperature

• Material in the water column

• Salinity

Answer explanation

Turbidity is a measure of the material in the water column, indicating the cloudiness or haziness caused by suspended particles.

Differentiating the deep sea into bathymetric zones uses

• depth

• slope

• amount of light

• turbidity

Answer explanation

The correct choice for differentiating the deep sea into bathymetric zones is depth, as it is based on the varying depths of the ocean floor.

What may play a role in allowing organisms to live at great depths?

• Photosynthesis

• Enzymes

• Osmolytes

• None of the above

Answer explanation

Osmolytes may play a role in allowing organisms to live at great depths by helping them adapt to extreme pressure and maintain proper cellular function.

Tags

NGSS.MS-LS4-4

NGSS.MS-LS3-1

Where do the origins of deep sea water come from?

• The equator

• The poles

• Hydrothermal vents

• Trenches

Answer explanation

The origins of deep sea water come from the poles, where cold, dense water sinks and forms the deep ocean currents.

Prior to sampling, what did many biologists think about the deep sea?

• It would be full of life

• It would lack of all life

• It would have moderate life

• None of the above

Answer explanation

Biologists thought the deep sea would lack all life prior to sampling.

What is the main difference between the deep sea and upper surface waters?

• In the deep sea there is too much light for photosynthesis

• In the deep sea there is no light for photosynthesis

• In the upper surface waters there is no marine life

• In the upper surface waters there is not light for photosynthesis

Answer explanation

The main difference is that in the deep sea there is no light for photosynthesis, unlike the upper surface waters.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What zone refers to the sea floor?

• Abyssal

• Benthic

• Aquatic

• Benekton

Answer explanation

The correct zone that refers to the sea floor is 'Benthic'. The benthic zone is the ecological region at the lowest level of a body of water, including the sediment surface and some sub-surface layers.

Tags

NGSS.MS-ESS2-3

What can kill a deep sea organism when bringing it up to the surface?

• extreme changes in pressure

• sunlight

• change in water temperature

• changes in salinity

Answer explanation

Changes in salinity can kill a deep sea organism when brought up to the surface due to the sudden shift in salt levels, disrupting its internal balance.

What factor in the deep sea remains relatively constant?

• Pressure

• Salinity

• Temperature

• Turbidity

Answer explanation

Salinity remains relatively constant in the deep sea, unlike pressure, temperature, and turbidity which can vary significantly.