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Ocean Currents

Total questions: 18

Worksheet time: 36mins

Name
Class
Date
1.

______ cause surface currents.

a)

The Coriolis Effect

b)

gravity

c)

density differences

d)

Surface wind patterns

2.

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

3.

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

a)

gyres

b)

eddies

c)

upwellings

d)

the equator

4.

_______ causes the Coriolis Effect

a)

Earth's rotation

b)

gravity

c)

wind

d)

density

5.

Gyres in the northers 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

6.

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

7.

Two types of ocean currents are

a)

local and global

b)

sea and land

c)

surface and deep

d)

warm and cold

8.

Temperature and salinity differences in ocean water cause:

a)

Mid-ocean ridges

b)

Deep Currents

c)

Surface Currents

d)

High tide and low tide

9.

Warm ocean currents generally come from

a)

The North Pole

b)

The South Pole

c)

The Equator

d)

Both A and B

10.

Movements of ocean water in a continuous flow are called?

a)

ocean currents

b)

global winds

c)

air mass

d)

front

11.
As salinity  increases
a)
Density increases
b)
Density decreases
12.
As Density  increases
a)
Temperature decreases
b)
Temperature increases
13.
The warm, strong current off the coast of Florida is the 
a)
Gulf Stream
b)
California Current
c)
North Equatorial Current
d)
Brazil Current
14.
What is the process where cold, deep water rises to the surface with nutrients?
a)
Upwelling
b)
Downwelling
c)
Swelling
d)
Tides
15.
Upwelling provides _________ for many sea organisms.
a)
Water
b)
Nutrients
c)
Air
d)
Heat
16.
Ocean currents bring warm water from the equator towards Earth's
a)
Southern Hemisphere
b)
Continents
c)
Equator
d)
Poles
17.
Currents release heat energy and this can affect an area's
a)
Oxygen
b)
Climate
c)
Upwelling
d)
Sunlight
18.
What do ocean currents move around the world?
a)
Gases
b)
Nutrients
c)
Heat Energy
d)
All of these