Podcast
Questions and Answers
What is the most accurate way to describe the meaning of ocean salinity?
What is the most accurate way to describe the meaning of ocean salinity?
- The amount of water in the ocean.
- The pressure exerted by the water at the ocean floor.
- The total amount of dissolved solids in a mass of water. (correct)
- The temperature gradient at various ocean depths.
The transition zone of the ocean extends from the surface to a depth of approximately 500 meters.
The transition zone of the ocean extends from the surface to a depth of approximately 500 meters.
False (B)
Name two properties of the ocean that scientists use to explore and study its characteristics.
Name two properties of the ocean that scientists use to explore and study its characteristics.
pressure, temperature
The average salinity of the ocean is approximately _______ ppt (parts per thousand).
The average salinity of the ocean is approximately _______ ppt (parts per thousand).
Match the ocean zone with its approximate depth:
Match the ocean zone with its approximate depth:
If ocean depth increases, what happens to temperature?
If ocean depth increases, what happens to temperature?
Seamounts are features of the ocean floor.
Seamounts are features of the ocean floor.
Name two variables that increase with increasing ocean depth.
Name two variables that increase with increasing ocean depth.
Which of the following is the deepest zone in the ocean, based on the depths provided?
Which of the following is the deepest zone in the ocean, based on the depths provided?
__________ is a method scientists use to explore the ocean.
__________ is a method scientists use to explore the ocean.
Flashcards
What is salinity?
What is salinity?
The amount of salt (dissolved solids) in a mass of water.
Ocean zones and depths?
Ocean zones and depths?
Surface (0-500m), transition (500m-1000m), deep (1km-bottom, 1000m-4000m).
Variables affecting oceans?
Variables affecting oceans?
Temperature, pressure, depth, salinity and density.
Features of the ocean floor?
Features of the ocean floor?
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What is SONAR?
What is SONAR?
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Depth's effect on variables?
Depth's effect on variables?
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What is ocean salinity?
What is ocean salinity?
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Study Notes
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The ocean's salinity is 3.5%, which is equivalent to 35 ppt
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Salinity is the amount of salt in the water, referring to dissolved solids in a mass of water
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The three zones of the ocean, with approximate depths, are:
Ocean Zones
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Surface: 0-500m
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Transition: 500m-1000m (0.5km-1km)
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Deep: 1km-bottom (1000m-4000m), with the bottom at 4km
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Five variables discussed regarding oceans and their interrelations are:
- Temperature (T)
- Pressure (P)
- Depth
- Salinity (S)
- Density (Den)
As depth increases:
- Temperature decreases (T↓) and Density increases (Den↑)
- Pressure increases (P↑) and Salinity increases (Sal↑)
- Features of the ocean floor include the continental shelf, continental slope, abyssal plain, seamounts, trenches, and mid-ocean ridges
Scientists explore the ocean using:
- Sonar
- Measurements of pressure and temperature have limited exploration abilities
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