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Oceans
Test Description: Review Questions
Instructions: Answer all questions to get your test result.
1) About how much of Earth's surface is covered by water ?
A
70%
B
0%
C
30%
D
100%
2) From largest to smallest, the amounts of water on Earth are
A
salt water, liquid fresh water, ground water
B
groundwater, salt water, solid fresh water
C
liquid fresh water, solid fresh water, salt water
D
salt water, solid fresh water, liquid fresh water
3) If you were able to walk along the ocean bottom from a beach, which of the following features would you reach after the continental shelf?
A
the abyssal plain
B
the midocean ridge
C
the continental slope
D
a seamount
4) What causes tides but NOT waves and currents?
A
mostly the sun's gravity
B
only winds
C
wind and the moon's gravity
D
mostly the moon's gravity
5) A wave will increase in height when the distance over which the WIND blows over the sea
A
decreases
B
increases
C
stays the same
D
is 0 kilomters
6) What is the main cause of the Gulf Stream?
A
winds that blow now and then
B
winds that blow in regular direction
C
the moon's gravity
D
storms
7) If the first high tide of the day occurs at 1:00 AM, the next high tide will come closest to
A
1:00 PM
B
7:00 AM
C
7:00 PM
D
1:00 AM the next day
8) Which is most likely a mountain range
A
the midocean ridge
B
a seamount
C
a guyot
D
the abyssal plains
9) Which two features together control the density of seawater?
A
salinity and depth
B
temperature and sea depth
C
temperature and salinity
D
salinity and plankton concentration
10) What is the main driving force for surface ocean currents?
A
surface water density
B
prevailing winds
C
salinity gradients
D
temperature gradients
11) In sea-floor spreading, molten material rises from the mantle and erupts
A
along mid-ocean ridges
B
along the edges of all the continents
C
in deep-ocean trenches
D
at the north and south poles
12) The process by which the ocean floor sinks beneath an deep-ocean trench and back into the mantle is known as
A
conduction
B
subduction
C
convection
D
continental drift
13) The scientist credited with sea-floor spreading is
A
Alfred Wegner, a German scientist
B
Dennis Lieding, a Libertyville social studies teacher
C
Harry Hess, an American Geologist
D
J. Tuzo Wilson, a Canadian scientist
14) When the sea floor spreads apart, volcanoes and ridges are formed because
A
sediments are deposited where the floor spreads, building ridges
B
as the plates pull apart, magma moves to the surface, building ridges
C
ocean water pushes down on the surrounding sea floor, pushing up ridges
D
underwater earthquakes lift the sea floor into long ridges
15) Which elements(besides hydrogen and oxygen) are most abundant in the oceans?
A
Sodium and Chlorine
B
Sodium and Sulfur
C
Sodium and Sulfur
D
Magnesium and Chlorine
16) Water in Earth's atmosphere comes mainly from
A
tropical rain forests
B
glaciers
C
underground rivers
D
the oceans
17) How does the sun play a role in the flow of ocean currents?
A
When the sun penetrates the ocean's surface and warms the water, convection currents are created thus causing ocean currents
B
The sun transfers electrons to the ocean and causes it to flow
C
The sun's radiation directly pushes the ocean currents
D
The ocean currents have no relation to the sun
*select an answer for all questions
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