14-1

Question 1

what is the Earth also referred to as?

Answer 1

the Blue Planet and the water planet

Question 2

how much of the earth’s surface is covered by the world’s ocean?

Answer 2

71%

Question 3

what is oceanography?

Answer 3

science that uses geology, chemistry, physics, and biology to study all the aspects of the world ocean

Question 4

what are the four main ocean basins?

Answer 4

pacific, atlantic, indian, arctic

Question 5

describe the pacific ocean

Answer 5

largest, deepest, more than half of ocean surface, world’s largest single geographic feature

Question 6

describe the atlantic ocean

Answer 6

½ the size of Pacific, not as deep, narrow

Question 7

describe the indian ocean

Answer 7

slightly smaller than Atlantic, same depth, majority is in the Southern Hemisphere

Question 8

describe the arctic ocean

Answer 8

7% size of Pacific, little more than ¼ as deep as the rest

Question 9

what is bathymetry?

Answer 9

measurement of ocean depths and charting of the ocean floor, HMS Challenger

Question 10

what is sonar?

Answer 10

Sound Navigation and Ranging, sound waves to calculate distance to an object. If ocean is shallow, sound waves return quickly, deep it takes longer, using speed of sound they calculate depth.

Question 11

what is a multibeam sonar?

Answer 11

new version of sonar, uses more than one sound source and listening device

Question 12

what are satellites?

Answer 12

uses radar to compute distance to ocean’s surface, distance calculated using radar speed and time it takes for signal to be reflected back

Question 13

what are submersibles?

Answer 13

small underwater crafts for deep-sea research
Used to collect data about areas of the ocean unreachable by humans, many instruments