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