OCEAN SYSTEM BACKGROUND

Question 1

sea water cover earth ocean %

Answer 1

70.8%

Question 2

oceans name

Answer 2

5

• atlantic
• indian
• antarctic
• arctic

Question 3

techniques for researching the oceans

Answer 3

• sonar
• drilling/samplin sea floor
• seismic surveying
• satellite altimetry

Question 4

techniques for researching the oceans: sonar

Answer 4

technique that uses sound propagation to navigate, measure distances, communicate with or detect objects on or under the surface of the water, such as other vessels

used to create bathymetry map

Question 5

techniques for researching the oceans: seismic surveying

Answer 5

low impact, non-invasive method of gathering information about location and characteristics of geological structures beneath Earth’s surface

information used to produce maps of structures identifying areas where gas deposits may be found

requires a controlled seismic source of energy, e.g dynamite

Question 6

techniques for researching the oceans: satellite altimetry

Answer 6

measure the ocean surface height (sea level) by measuring the time it takes a radar pulse to make a round-trip from the satellite to the sea surface and back