Sci F1 C9.1 Ocean Stratification

What are the three main layers of the ocean?

• surface zone, midnight zone, dark zone

• upper zone, middle zone, lower zone

• continental shelf, abyssal zone, hadal zone

• epipelagic zone, mesopelagic zone, bathypelagic zone

Which layer of the ocean is the warmest?

• bottom zone

• midnight zone

• surface zone

• dark zone

What is the average salinity of seawater?

• 1.5%

• 3.5%

• 5%

• 10%

What is the midnight zone?

• The water is very shallow and light can penetrate.

• This zone has little or no light.

• This zone is very deep and no light can reach it.

• The zone suitable as a habitat for plants.

What causes the stratification of the ocean?

• Differences in temperature, salinity, and density of the water.

• Variations in ocean currents

• Changes in atmospheric pressure

• Interactions with marine life

What is the primary factor that determines the density of seawater?

• temperature

• pressure

• oxygen content

• salinity

What is the difference between the surface layer and the deep layer of the ocean?

• The surface layer is colder, receives less sunlight, and has less oxygen compared to the deep layer.

• The surface layer is deeper, receives less sunlight, and has less oxygen compared to the deep layer.

• The surface layer is shallower, receives more sunlight, and has less oxygen compared to the deep layer.

• The surface layer is warmer, receives sunlight, and has more oxygen compared to the deep layer.

How does temperature change with depth in the ocean?

• Temperature increases with depth.

• Temperature remains constant with depth.

• Temperature fluctuates randomly with depth.

• Temperature decreases with depth.

How much fresh water is from the whole earth?

• 97%

• 87%

• 3%

• 2%

How does the distribution of water on Earth affect ocean stratification?

• The distribution of water on Earth affects ocean stratification through variations in water pressure caused by uneven heat and freshwater inputs.

• The distribution of water on Earth affects ocean stratification through variations in water density caused by uneven heat and freshwater inputs.

• The distribution of water on Earth affects ocean stratification through variations in water salinity caused by uneven heat and freshwater inputs.

• The distribution of water on Earth affects ocean stratification through variations in water temperature caused by uneven heat and freshwater inputs.