Oceanography 24 & 25

Ocean Zones

Tides Ocean Water

Elements Grab bag

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The bottom region of the ocean

Answer

Benthic Zone

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The movement of deep, cold, and nutrient-rich water to the surface

Answer

Upwelling

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The region of an ocean or body of fresh water above the benthic zone.

Answer

Pelagic Zone

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What are the two main solids dissolved in ocean

water?

Answer

Sodium and Chlorine

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What are the 3 main temperature zones in the

ocean?

Answer

1. Surface water- solar energy

2. Thermocline- where Sun stops heating

3. Deep Water- cold water becomes dense & sinks

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The water in the ocean moves in giant streams called ____

Answer

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Currents

The shallow sea floor that is located between the

shoreline and the deep-ocean bottom

Answer

Continental Margin

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What is SONAR?

Answer

Sound Navigation and Ranging- uses sound

waves to find depths of the ocean floor

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What 2 factors affect the density of ocean water?

Answer

Temperature and Salinity

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What ocean floor feature is created at a subduction zone?

Answer

Trench

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A measure of the amount of dissolved

salts in a given liquid

Answer

Salinity

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The ratio of the mass of a substance to the

volume of the substance

Answer

Density

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The curving of the paths of ocean currents and winds due to Earth’s rotation is called the

_________Answer

Coriolis Effect

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A layer in a body of water in which water

temperature drops with increased depth faster than

it does in other layers

Answer

Thermocline

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What are microscopic organisms that live in the sunlit zone, creating the base of the food chain?

Answer

Plankton

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Answer

The force that causes tides is _____________

Gravity

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Waves strike the coastline head-on instead of at an

angle as a result of ________

Answer

Refraction

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Gases dissolve most readily in what kind

of water?

Answer

Cold ocean water

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Trace elements in the ocean are those

minerals that are __________ in amount

Answer

Smallest

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Answer

The 2 main gases dissolved in ocean water are ___________ and

________________

Nitrogen and oxygen

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The distance the wind blows across an area of the sea to generate waves is known as

_________

Answer

Fetch

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2 identical points on consecutive waves pass a

given point in one __________

Answer

Wave Period

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What ocean floor feature is created when two oceanic

plates diverge?

Answer

Mid-ocean Ridge

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What is the research vessel that laid the foundation for modern day oceanography?

Answer

HMS Challenger

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Deep currents are caused by differences in _____________

Answer

Density of ocean water

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