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Earth Science > Oceans > Flashcards

Oceans Flashcards

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1
Q

The largest and deepest ocean

A

Pacific

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2
Q

Third largest ocean

A

Indian

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3
Q

The smallest shallowest ocean

A

Arctic

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4
Q

Two main gases in seawater are

A

Nitrogen and oxygen

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5
Q

Where does most of the oxygen in the ocean come from?

A

The atmosphere

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6
Q

What 4 factors change salinity

A

Movement
Tempt
Depth
Precipitation

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7
Q

Name the 5 zones in the ocean

A 
Sunlit 
Twilight 
Dark 
Abyss 
Deep Sea anemone
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8
Q

Explain the abyss feature

A

No sunlight

Flattest place on earth

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9
Q

Deepest area on earth

A

Trenches

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10
Q

What does the water tempt do as it gets deeper

A

Gets colder

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11
Q

Major floor is divided into 2 areas

A

Continental margin

Deep ocean basin

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12
Q

Define the thermocline layers

A

Layer that changes tempt

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13
Q

2 factors that affect density

A

Salinity and tempt

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14
Q

Amount of energy a wave carries is called

A

Amplitude

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15
Q

How is amplitude measured on a wave

A

From resting point to crest

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16
Q

What is the layer that’s separates the warm water from the colder water

A

Thermacline

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17
Q

Undertow vs rip currents

A

Undertow is not as strong as rip tide

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18
Q

How do waves usually form

A

When the wind blows across the waters surface

19
Q

What are the two tidal ranges

A

Spring and neap

20
Q

What is the highest tidal range

A

Spring tide

21
Q

What is the lowest tidal range

A

Neap tide

22
Q

What are large streams of moving water that flow through the ocean called

A

Ocean currents

23
Q

What are two types of ocean currents

A

Surface and deep currents

24
Q

What winds push currents to the WEST across the ocean

A

Trade winds

25
Q

What currents winds push currents to the EAST across the oceans

A

Westerly winds

26
Q

What are surface currents

A

Wind driven currents near the top of the ocean

27
Q

3 things affects surface currents

A

Global wind belts
Location of the continents
The earths rotation

28
Q

Define the coriolis effect

A

The curving of the path of ocean currents due to earths rotation

29
Q

Gyres

A

Lopped systems of surface currents

30
Q

What direction do gyres in the northern hemisphere circle?

A

Clockwise

31
Q

What direction do gyres in the Southern Hemisphere circle

A

Counterclockwise

32
Q

What is so great about upwelling

A

They provide nutrition for da fishies

33
Q

How do surface climates affect the climate

A

They warm or cool the air and change temperature

34
Q

Four parts of the continental margin

A

Continental shelf
Continental rise
Continental slope
Submarines canyons

35
Q

5 pats of the deep ocean basin

A 
The abyssal plains 
Seamounts 
Guyots 
Mid ocean ridge 
Trenches
36
Q

What is a seamount

A

Underwater volcano

37
Q

Guyots

A

A seamount that has risen above the surface of the ocean to form an island but has sun h back into the ocean where they are eroded in the flat topped

38
Q

Flattest part of the ocean

A

They abyssal plain

39
Q

what part of the ocean are we standing on

A

Continental shelf

40
Q

Where are submarines canyon often found

A

At the mouth of rivers

41
Q

What are turbidity currents

A

Strong dense currents that carry away large amounts of sediments

42
Q

What is the deepest places on earths crust

A

Ocean trenches

43
Q

Name the deepest trench on earth

A

Mariana trench

Earth Science (6 decks)

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