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Marine Resources C15
Test Description: Marine Resources
Instructions: Answer all questions to get your test result.
1) Nearly half the world;s manganese comes from
A
methane hydrates
B
seabed sediments
C
natural gas
D
sea water
2) Sea water evaporites are used in the production of
A
medicine and fertilizer
B
all of the answers are correct
C
water softners and construction materials
3) Phosphorite deposits are the remains of marine organisms in upwellings
A
false
B
true
4) Most phosphorite deposits are found on land because
A
phosphorites are not important
B
off shore phosphorites are expensive to harvest
C
the need for phosphorites is decreasing
D
none of the answers are correct
5) Hydrothermal vents and marine mud are potential sources of
A
sulfur
B
all of the answers are correct
C
cobalt
D
copper and zinc
6) ________________ is second only to gas and oil in terms of annual economic value
A
methane hydrates
B
sand and gravel
C
magnesium
D
evaporites
7) Renewable energy is found in
A
tides, waves and currents
B
all of the answers are correct
C
none of the answers are correct
D
hurricanes and typhoons
8) The most feasible renewable energy resource from the ocean is
A
none of the answers are correct
B
the energy in waves
C
the energy in currents
D
the energy in tides
9) The concern about fresh water is
A
melting ice caps will dilute the ocean
B
demand for the fresh water will soon exceed the supply of fresh water
C
none of the answers are correct
10) To use sea water as fresh water, we must
A
none of the answers are correct
B
force the seawater through a reverse osmosis filter
C
boil the sea water and collect the vapor
*select an answer for all questions
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