The Oceans - Chapter 2: Deep Ocean Circulation

Question 1

What governs deep ocean circulation?

Answer 1

Gravity

Density differences

Question 2

What are the two factors significant for creating a dense mass of water?

Answer 2

Temperature

Salinity

Question 3

Sea water becomes denser with ____ temperature

Answer 3

decreased

Question 4

Sea water becomes denser with ____ salinity

Answer 4

increased

Question 5

Deep ocean circulation is called ______

Answer 5

thermohaline circulation

Question 6

After leaving the surface of the ocean, waters will not reappear at the surface for an average of _____ years

Answer 6

500-2000

Question 7

What is the basic process of thermohaline circulation?

Answer 7

1. Water at surface made colder (lose heat to atmosphere)
2. OR water more salty (evaporation at surface)
3. This water, more salty/colder becomes more dense
4. Denser water sinks to the bottom and displaces less dense water that moves back toward the zone where the dense water formed