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Earth science > Ocean Unit test part 1 > Flashcards

Ocean Unit test part 1 Flashcards

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1
Q

Mass, volume, and density are all measurement properties of…

A

matter

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2
Q

matter is…

A

anything that takes up space

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3
Q

what does density help with

A

helps us to classifying
objects and understand why they behave they way they do in nature

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4
Q

what is density

A

measure of how compact something is or more technical how much mass
per unit of volume

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5
Q

how do you measure density

A

D= m/v

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6
Q

where does the ocean salt come from?

A

weathering of rocks on the continents and Earth’s interior

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7
Q

salinity is?

A

measure of the total amount of salt dissolved in water

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8
Q

example of decrease in salinity

A

Precipitation, Runoff, Icebergs and Sea Ice Melting

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9
Q

example of increase in salinity

A

Evaporation, Formation of Icebergs and Sea Ice

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10
Q

The more salt in the water…

A

the denser it becomes

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11
Q

do dense things sink or float

A

sink

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12
Q

higher latitudes get less direct sunlight so generally cooler is from what?

A

Latitude

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13
Q

the deeper you go the colder it gets… to a point. This is from sunlight not reaching lower layers is the?

A

depth

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14
Q

thermocline is…

A

period of steep temperature drop

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15
Q

what is the largest reservoir of heat on Earth

A

the ocean

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16
Q

The colder water gets…

A

the denser it becomes until it freezes.

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17
Q

why does ice float

A

because the water expands when it freezes which causes it to be less dense

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18
Q

what are the 2 greatest factors that determine the density of oceanwater?

A

Salinity and temperature

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19
Q

what causes the ocean’s to drive out many processes?

A

Density differences

20
Q

More salt =

A

more dense

21
Q

colder water=

A

more dense

22
Q

how does the ocean water hold gasses?

A

It stores oxygen and carbon dioxide. Many marine organisms rely on dissolved oxygen in order to live

23
Q

which holds more oxygen, cold or warm water?

A

cold water

24
Q

Aquatic plants, algae, and waves all add

A

oxygen back into the water

25
Q

Algae in the oceans are an important source of what?

A

atmospheric oxygen

26
Q

This increased CO2 can make ocean water…

A

more acidic and be dangerous for
organisms

27
Q

why is the amount of carbon dioxide rising in the ocean’s?

A

because the CO2 levels in the atmosphere rise

28
Q

what keeps Europe warm even though it has a high latitude

A

the gulf stream

29
Q

Surface currents are caused by

A

wind

30
Q

Gyres are?

A

large circular current systems

31
Q

the Coriolis effect is?

A

the rotation of Earth causes things to move in a particular way (Currents in the northern hemisphere move to the right and in the southern hemisphere to the left)

32
Q

thermohaline currents are also known as?

A

deep ocean currents

33
Q

Freshwater at the poles freezes in the ice caps leaves what?

A

salty and really cold water that sinks.

34
Q

what happens when water sinks?

A

warmer water gets pulled into its place created a global conveyor belt system

35
Q

Upwellings are also caused by the

A

wind

36
Q

upwellings push out warm surface water and…

A

bring up cold nutrient rich water to the
surface

37
Q

upwellings are important to…

A

fishing

38
Q

Longshore currents are…

A

waves hit the shore at an angle more, moves
sediment down the shore

39
Q

what are Barrier Islands

A

islands parallel to the shore

40
Q

what is an Undertow

A

waves break water is pulled back out to deeper water by gravity

41
Q

how should you get out of rip currents

A

Swim parallel to the shore, then to the beach once you get past the current!

42
Q

what are waves

A

energy moving through water, they get their energy from the wind.

43
Q

In ocean waves the energy moves but…

A

water goes in a circular orbit.

44
Q

what are Tsunamis?

A

giant waves created by underwater earthquakes. The breaking of the crust releases a large amount of energy

45
Q

what is Spring tide

A

when Earth, Moon, and Sun are in a
line (Large tidal range)

46
Q

Neap tide-

A

when the Moon is at a right angle
(Small tidal range)

Earth science (5 decks)

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