Ocean

Question 1

Pacific ocean

Answer 1

It extends from the Arctic Ocean in the north to the Southern Ocean in the south. It is the biggest and deepest ocean.

Question 2

Atlantic ocean

Answer 2

It covers approximately 20% of Earth’s surface and about 29% of its water surface area. is the second-largest of the world’s five oceans

Question 3

Indian ocean

Answer 3

covering 70,560,000 km² or ~19.8% of the water on Earth’s surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. is the third-largest of the world’s five oceanic divisions

Question 4

Arctic ocean

Answer 4

It spans an area of approximately 14,060,000 km² and is known as the coldest of all the oceans. is home to several million people.

Question 5

Southern ocean

Answer 5

also known as the Antarctic Ocean, comprises the southernmost waters of the world ocean, generally taken to be south of 60° S latitude and encircling Antarctica. you can join the Antarctic Swimmers Club with a brisk but brief plunge in the Antarctic Ocean.

Question 6

Salinity

Answer 6

the measure of dissolved salts in water.

Question 7

surface zone

Answer 7

the measure of how much exposed area a solid object has, expressed in square units.

Question 8

Thermocline

Answer 8

the transition layer between the warmer mixed water at the surface and the cooler deep water below.

Question 9

deep zone

Answer 9

the depth at which light begins to dwindle, typically around 200 meters (656 feet).

Question 10

water cycle

Answer 10

the continuous movement of water within the Earth and atmosphere.

Question 11

Evaporation

Answer 11

the process that changes liquid water to gaseous water

Question 12

Condensation

Answer 12

the process by which water vapor in the air is changed into liquid water

Question 13

Precipitation

Answer 13

any liquid or frozen water that forms in the atmosphere and falls back to the earth.

Question 14

continental shelf

Answer 14

the slope seaward from the shelf to the upper edge of a continental rise or the point where there is a general reduction of slope.

Question 15

continental slope

Answer 15

the slope seaward from the shelf to the upper edge of a continental rise or the point where there is a general reduction of slope.

Question 16

continental rise

Answer 16

a major deposition regime in oceans made up of thick sequences of continental material that accumulate between the continental slope and the abyssal plain.

Question 17

abyssal plain

Answer 17

a flat region of the ocean floor, usually at the base of a continental rise, where slope is less than 1:1000.

Question 18

mid-ocean ridge

Answer 18

an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from up welling magma.

Question 19

rift valley

Answer 19

a lowland region that forms where Earth’s tectonic plates move apart, or rift.

Question 20

Seamount

Answer 20

an underwater mountain formed by volcanic activity.

Question 21

ocean trench

Answer 21

long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.

Question 22

Plankton

Answer 22

An organism is considered plankton if it is carried by tides and currents, and cannot swim well enough to move against these forces.

Question 23

Nekton

Answer 23

living organisms that are able to swim and move independently of currents.

Question 24

Benthos

Answer 24

the assemblage of organisms inhabiting the seafloor.

Question 25

desalination

Answer 25

the removal of the excess salt or other minerals from water, such as seawater, to obtain freshwater suitable for irrigation or human consumption.