Chapter Fifteen

Question 1

Oceanography

Answer 1

The scientific study of earth’s oceans. Usually considered to have started with the challenger expedition.

Question 2

Side scan sonar

Answer 2

A technique that points sound waves at an angle to map sides of underwater hills and such

Question 3

Sonar

Answer 3

SOund NAvigation and Ranging

Question 4

Sea level

Answer 4

The level of the surface of the oceans

Question 5

Salinity

Answer 5

How much dissolved salt in seawater. Usually expressed in grams of salt per kilogram of water OR parts per thousand (same thing) OR ppt (abbreviated version of parts per thousand)

Question 6

Temperature profile

Answer 6

Plots changing water temperatures by depth. Varies due to location and season

Question 7

Thermocline

Answer 7

A water layer with rapidly changing temperature with depth

Question 8

Wave

Answer 8

Rhythmic motion that carries energy through space/stuff

Question 9

Crest

Answer 9

Highest point of wave

Question 10

Trough

Answer 10

Lowest point of wave

Question 11

Breaker

Answer 11

A collapsing wave

Question 12

Tides

Answer 12

The rise and fall of sea level in a location. Caused by sun and moon gravity

Question 13

Density current

Answer 13

A current where denser water moves down and not dense water moves up.

Question 14

Surface current

Answer 14

A current that is at the upper few hundred meters of ocean. Driven by wind

Question 15

Upwelling

Answer 15

When trade winds blow water offshore and the cold water rises to take its place. Tons of nutrients!!1!