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Ocean Currents

Total questions: 14

Worksheet time: 11mins

Name
Class
Date
1.

______ causes surface currents.

a)

The Coriolis Effect

b)

gravity

c)

density differences

d)

wind

2.

______ causes deep ocean currents

a)

The Coriolis Effect

b)

gravity

c)

wind

d)

density differences

3.

Decreasing ocean temperature causes the density of the water to ______.

a)

decrease

b)

increase

c)

stay the same

d)

fluctuate

4.

As plants and animals in the ocean die, the nutrients produced from their decay _____.

a)

are recycled by the Global Conveyor Belt

b)

sink to the bottom

c)

are destroyed by sunlight

d)

become coral reefs

5.

Nutrients are brought to the surface for phytoplankton to use at _______.

a)

gyres

b)

eddies

c)

upwellings

d)

the equator

6.

_______ causes the Coriolis Effect

a)

Earth's rotation

b)

gravity

c)

wind

d)

density

7.

The __________ is a surface current that flows along the eastern US and brings warm water to Europe.

a)

California Current

b)

Gulf Current

c)

North American Gyre

d)

Arctic Current

8.

There are (is) _______ major gyres in each ocean.

a)

1

b)

2

c)

3

d)

4

9.

Gyres in the southern hemisphere are surface currents that turn _________ due to the Coriolis Effect.

a)

clockwise

b)

counterclockwise

c)

toward the right

d)

toward the bottom of the ocean

10.

_______ are the producers of Antarctic food webs.

a)

Zooplankton

b)

Phytoplankton

c)

Whales

d)

Upwellings

11.

_________ food chains support larger ocean animals because _________ water has more nutrients.

a)

Antarctic/warmer

b)

Antarctic/colder

c)

Equatorial/colder

d)

Equatorial/warmer

12.

When looking at a satellite map of eddies, the cold-core eddies are more likely to have ________.

a)

downwellings

b)

upwellings

c)

very few nutrients

d)

very little dissolved oxygen

13.

________ and _______ affect the ocean's density and cause the Global Conveyor Belt to travel

a)

gravity and the Coriolis Effect

b)

temperature and salinity

c)

wind and climate

d)

temperature and the Coriolis Effect

14.

The more scientific name of the Global Conveyor Belt is _____.

a)

halinethermal circulation

b)

thermohaline circulation

c)

thermodensity circulation