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