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sience > The Oceans > Flashcards

The Oceans Flashcards

0
Q

Salinity:

A

The amount of dissolved solids of salts in seawater.

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1
Q

Divisions of the global oceans

A

Pacific Ocean
Atlantic Ocean
Arctic Ocean
Indian Ocean

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2
Q

What’s the average salts per thousand in the ocean?

A

35g per thousand

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3
Q

What are the top 2 dissolved solids?

A

Cl=chlorine

Na=sodium

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4
Q

What are the 3 dissolved gasses?

A

(O2) Oxygen
(N2) Nitrogen
(CO2) Carbon Dioxide

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5
Q

When temperature goes down what happens to the dissolved gasses?

A

They go up!

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6
Q

Surface zone

A

Often 0m to 200m (can vary)
•heated by sunlight
•surface currents mix the heated water.

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7
Q

Thermocline

A

Begins about 200m to 700m

• temp drops quickly because of no sunlight

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8
Q

Deep zone

A

Extends from thermocline to the bottom.
• temp 1/3 degrees C
• absolute darkness

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9
Q

Water pressure…

A

10m = 1 atmosphere of pressure

1 atmosphere pressure = 14.7 PSIA

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10
Q

Surface Currents

A

Currents powered by global winds.

Usually only in the top few hundred meters

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11
Q

Density Currents:

A

Form when more dense seawater sink below less dense seawater.

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12
Q

Upwelling:

A

Current that brings deep cold water to the surface.

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13
Q

Plankton:

A

Most are single celled organisms.

Mostly drift around the sea.

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14
Q

Nekton:

A

Animals that actively swim.

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15
Q

Benthic:

A

Bottom dwellers.

16
Q

Producers:

A

Organisms that make their own food.

17
Q

Consumers:

A

Animals that eat producers and other consumers

18
Q

Decomposers:

A

Breaks down dead consumers and producers.

• returns CO2 and N2 to the oceans

19
Q

Food chain:

A

A diagram that shows how energy flows from one organism to another

20
Q

Food web:

A

A diagram that shows the feeding relationships between organisms in an ecosystem

sience (9 decks)

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