Resources from the Sea (part 2)

Question 1

How many percent of the world’s supply of salt comes from seawater?

Answer 1

30%

Question 2

About 30% of the world’s supply of salt comes from _

Answer 2

seawater

Question 4

to make the water useful for irrigation or drinking

Answer 4

desalination

Question 5

how many percent of the world’s supply of magnesium come from seawater?

Answer 5

60%

Question 6

How many percent of the world’s supply of bromine came from seawater?

Answer 6

70%

Question 7

used as a disinfecting and bleaching agent and a reagent in numerous commercial chemical applications

Answer 7

bromine

Question 8

combined with other metals to form alloys

Answer 8

magnesium

Question 9

being used to explore and sample the ocean floor of Papua New Guinea for minerals containing gold, silver, zinc, and more

Answer 9

Remotely operated vehicles (ROVs)

Question 10

In combination with copper, it forms alloys that are
sensitive to temperature changes and that are used in temperature-activated switches such as thermostats

Answer 10

manganese

Question 11

In combination with iron, it strengthens steel and
makes it easier to mold

Answer 11

manganese

Question 12

Most widespread seafloor mining operations extract sand and gravel used in cement and concrete and for building artificial beaches

Answer 12

sand and gravel

Question 13

may be tapped in the future as
reserves of fossil fuels are depleted

Answer 13

methane hydrate

Question 14

Ice crystals that trap methane are known as

Answer 14

methane hydrate

Question 15

Ice that burns, and represent the world’s largest
known fuel reserve

Answer 15

methane hydrate

Question 16

the
tremendous energy
contained in the normal
ebb and flow of the tides

Answer 16

tidal energy

Question 17

tidal range is high as it is at least

Answer 17

3m (10 ft)

Question 18

circulate ammonia,
propane, or another liquid that
boils at low temperature through
pipes bathed in warm surface
water

Answer 18

Ocean thermal energy conversion

Question 19

scientific study of life in the sea

Answer 19

marine biology

Question 20

Broader science and itself made up of many
different disciplines, approaches, and viewpoints

Answer 20

marine biology

Question 21

the scientific study of the oceans

Answer 21

oceanography

Question 22

marine geologists, study the seafloor

Answer 22

geological oceanographers

Question 23

study ocean chemistry

Answer 23

chemical oceanographers

Question 24

study waves, tides, currents, and other physical aspects of the sea

Answer 24

physical oceanographers

Question 25

tend to study marine life from the perspective of the organisms

Answer 25

marine biologists

Question 26

tend to take the perspective of the ocean

Answer 26

biological oceanographers