Why are surface currents at the surface of the ocean?
colder temperature
colder temperature & more salinty
warmer temperature & less salinty
less salinty
6. Multiple Choice
1 minute
1 pt
As you go deeper in the ocean, the water is colder and less salty.
True
False
7. Multiple Choice
20 seconds
1 pt
Sunlight strikes this planet most directly at the_____________.
mesosphere
tundra
equator
south pole
8. Multiple Choice
20 seconds
1 pt
Compared with surface currents, deep currents are
colder and less dense.
warmer and less dense.
warmer and denser.
colder and denser.
9. Multiple Choice
20 seconds
1 pt
Which of the following causes water from deep currents to rise to the surface to replace warm currents?
evaporation
freezing of the surface of the water
upwelling
squeezing solids out of the ice down into the water below
10. Multiple Choice
30 seconds
1 pt
The process of deep, nutrient-rich water moving upward to replace surface water that has blown farther offshore is called ___.
downwelling
upwelling
rip current
longshore current
11. Multiple Choice
1 minute
1 pt
What is the cause of rising surface temperatures of the Pacific Ocean, drought in the western United States, and flooding on the Pacific coast of South America?
the Gulf Stream
the Jet Stream
La Nina
El Nino
12. Multiple Choice
30 seconds
1 pt
Upwelling along the western Pacific creates:
Smaller food webs
Poor fishing conditions
Productive oceans
13. Multiple Choice
2 minutes
1 pt
The curving of air to the right in the Northern hemisphere is caused by ___________ and is called the _________ effect.
Earth's rotation...Coriolis
Earth's revolution...Coriolis
Earth's rotation...Doppler
Earth's revolution...Doppler
14. Multiple Choice
30 seconds
1 pt
Temperature and salinity affect the ______ of water.