The Earth is spinning through the tidal bulges. In 24 hours, generally,

there are two high tides and two low tides

Which are larger tides, spring tides or neap tides?

spring tides; the moon and sun are aligned ("spring forth")

The California Current is a:

cold current that flows north to south

Deep currents are caused by:

differences in density of ocean water

The Westerlies are at what latitude and from what direction?

middle latitude, blows from west to east

The Coriolis effect in the Northern Hemisphere causes surface ocean currents to:

curve (like a car) to the right and clockwise

Which condition forms a deep current?

sea ice increases the amount of salt in the remaining water

Which of the following is false?

The Atlantic Circumpolar is a warm current

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Earth Science Ocean Currents

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Holt Ch. 21

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Answers

1
The Earth is spinning through the tidal bulges. In 24 hours, generally,
there is only one high tide
there are two high tides and one low tide
there are two high tides and two low tides
there is one high tide and one low tide
2
Which are larger tides, spring tides or neap tides?
neither are greater
tsunamis, which happen in the spring
spring tides; the moon and sun are aligned ("spring forth")
neap tides; sun-earth-moon NOT in line ("without strength")
3
The California Current is a:
warm current that flows south to north
warm current that flows north to south
cold current that flows north to south
cold current that flows south to north
4
Which of the following does NOT affect the way that surface currents move?
Salinity of ocean water
Location of continents
Rotation of the Earth
winds
5
Deep currents are caused by:
continental barriers
global wind belts
the Coriolis effect
differences in density of ocean water
6
What part of a wave is part F?
trough
wave height
wavelength
crest
7
What is the effect of wind energy on waves?
All waves become equal
Large waves become larger
Small waves stay the same
Large waves become smaller
8
What happens to the wavelength of ocean waves as they approach the shore?
increases
decreases
doubles
stays the same
9
The Westerlies are at what latitude and from what direction?
low latitude, blows from east to west
low latitude, blows west to east
middle latitude, blows from east to west
middle latitude, blows from west to east
10
Tsunamis are mostly caused by:
hurricanes
winds
earthquakes
the Coriolis effect
11
When the earth is directly between the sun and moon, there will be this kind of tide:
high tide
neap tide
spring tide
low tide
12
The difference in ocean levels between a high tide and the next low tide is called:
spring tide
neap tide
tidal range
tidal wave
13
The distance between two consecutive wave crests is:
a swell
one wavelength
one wave period
one trough
14
Which of the following is a cold water current?
Kuroshio
Peru
Gulf Stream
Brazil
15
The Coriolis effect in the Northern Hemisphere causes surface ocean currents to:
curve (like a car) to the right and clockwise
curve (like a car) to the right and counter clockwise
curve (like a car) to the left and clockwise
curve (like a car) to the left and counter clockwise
16
Which current is not a part of the North Atlantic Gyre?
Brazil
Canary
North Equatorial
Gulf Stream
17
The curving path of oceans and winds due to the Earth's rotation is called the:
Coriolis effect
surface current
deep current
Gulf Stream
18
Which condition forms a deep current?
sea ice increases the amount of salt in the remaining water
water heated by the sun is denser than cold water
sediment laden water flows into the ocean from rivers
growth of plankton removes nutrients from the water
19
Which of the following is false?
currents transfer heat or cold to different other places
currents that curve away at the equator are warm
The Atlantic Circumpolar is a warm current
High latitude currents bring cooler water to lower latitudes
20
The force that causes tides is:
gravity
wind
friction
earthquakes

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