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Oceans

Total questions: 65

Worksheet time: 51mins

Name
Class
Date
1.
What is the most common salt found in ocean water?
a)
Calcium Carbonate
b)
Sodium Potassium
c)
Calcium Magnesium
d)
Sodium Chloride
2.
 How do conditions change as the depth of the ocean water increases?
a)
temperature decreases and pressure increases
b)
temperature increases and pressure increases
c)
temperature decreases and pressure decreases
d)
temperature increases and pressure decreases
3.
What conditions would most likely cause a decrease in the salinity of ocean water?
a)
High rates of evaporation
b)
Freezing glaciers
c)
Extremely hot weather
d)
A river flowing into the sea
4.
What conditions would most likely cause an increase in the salinity of ocean water?
a)
High rates of evaporation
b)
Thawing of glaciers
c)
Precipitation
d)
A river flowing into the sea
5.

Which statement best explains the relationship between an area's geography and the temperature of its surface water?

a)

Areas at low latitudes have the warmest water because they have the least change in temperature throughout the year.

b)

Areas at high latitudes have the warmest water because they have the longest seasons.

c)

Areas at low latitudes have the warmest water because they receive the most direct sunlight.

d)

Areas at high latitudes have the warmest water because their days are the longest.

6.
 The density of ocean water is influenced by what two factors?
a)
 Salinity and temperature
b)
Water color and chlorophyll
c)
 Dissolved gases and dissolved solids
d)
 Dissolved carbon and trace elements
7.
 DEEP ocean currents are the result of
a)
Winds
b)
 Tides
c)
Changes in the density of ocean water
d)
 The Coriolis effect
8.
What is a current?
a)
temperature and precipitation typical of an area over a long period of time
b)
most powerful surface current in the North Atlantic Ocean
c)
large stream of water that flows through lakes and/or oceans 
d)
large stream of moving water that flows through the oceans
9.

Where would you find the lowest density seawater

a)

surface zone

b)

transition zone

c)

abyssal zone

10.
The energy that drives surface ocean currents comes from
a)
wind
b)
wave action
c)
temperature differences
d)
salinity variation
11.
Because of the Coriolis effect, ocean currents in the Northern Hemisphere are deflected 
a)
North
b)
South
c)
Clockwise
d)
Counter clockwise
12.
Ocean currents that move toward the poles are
a)
Warm in the N Hemisphere cold in the S Hemisphere
b)
Warm
c)
Cold
d)
Cold in the N Hem. warm in the S Hem.
13.

The Gulf Stream affects the climate of

a)

Great Britain

b)

North Caroliina

c)

South Carolina

d)

All of these

14.
The rising of cold water from deeper layers to replace warmer surface water is called__________
a)
The Coriolis effect
b)
A surface current
c)
Reflection
d)
Upwelling
15.

Which the following is most responsible for the tides on Earth?

a)

gravity

b)

winds

c)

temperature differences in seawater

d)

plate tectonics

16.
Which of the following results in the least difference between high tide and low tide?
a)
spring tide
b)
summer tide
c)
rip tide
d)
neap tide
17.
What is the relationship between oxygen in water and plankton abundance?
a)
As oxygen levels increase, plankton populations increase.
b)
As oxygen levels increase, plankton populations decrease.
c)
As oxygen levels increase, phytoplankton populations increase but zooplankton populations decrease.
d)
There is no relation between plankton abundance and oxygen content.
18.
The water in upwellings is
a)
cold
b)
nutrient-rich
c)
oxygen rich
d)
all of the above
19.
Spring tides occur when which of the following bodies form a straight line with Earth?
a)
the sun and the moon
b)
the moon and Venus
c)
the sun and Mars
d)
Venus and Mars
20.
What is the most abundant gas found in ocean water?
a)
oxygen
b)
carbon dioxide
c)
carbon monoxide
d)
nitrogen
21.
An observer notices waves 10 meters apart and a new wave passes her every 2 seconds.  What is the wave speed?
a)
0.2 m/s
b)
5 m/s
c)
20 m/s
22.
The distance between the first and fourth wave crests is 24 meters.  It takes 12 seconds for all four waves to pass.  What is the wave speed?
a)
2 m/s
b)
0.5 m/s
c)
288 m/s
23.
Why does ice float in the ocean?
a)
the ice is warmer than the ocean
b)
the ice is less dense than the ocean
c)
the ice is more dense than the ocean
d)
the ice melts faster than it can sink
24.
What term is the measure of dissolved salts in water?
a)
Thermocline
b)
Salinity
c)
Saltiness
d)
Tides
25.
What is the steep slope at the edge of the continental shelf?
a)
seamount
b)
mid-ocean ridge
c)
continental slope
d)
rift zone
26.
What are underwater mountain ranges called?
a)
continental shelf
b)
mid-ocean ridges
c)
abyssal plains
d)
continental slopes
27.
What is the deepest part of the ocean basin?
a)
abyssal plains
b)
trenches
c)
rift zones
d)
mid-ocean ridge
28.

Scientists used ______ to determine the oceans depth.

a)

Submarines

b)

Sonar

c)

Helicopters

d)

Radiowaves

29.
What happens to pressure as you go deeper into the ocean? 
a)
increases
b)
decreases
c)
stays the same
d)
doubles
30.

Free-floating microscopic photosynthetic plants.

a)

phytoplankton

b)

kelp

c)

crustaceans

d)

zooplankton

31.

Mid-ocean ridges (underwater mountain ranges) occur at __________ boundaries.

a)

transform

b)

transform

c)

divergent

d)

convergent

32.

The most valuable resource found in the ocean is

a)

salt

b)

fish

c)

petroleum

d)

trace elements

33.
Which three factors are most important in determining the composition of ocean water?
a)
Salinity, mass, density
b)
Temperature, salinity density
c)
Volume, density, temperature
d)
Density, temperature, mass
34.
Two types of water currents are
a)
local and global
b)
sea and land
c)
surface and deep
d)
warm and cold
35.
97% of the water on earth is _________, making it undrinkable for humans.
a)
fresh water
b)
ground water
c)
salt water
d)
surface water
36.
10. Watershed is....?
a)
Most of the landmass that makes up North America
b)
Almost 80 % of Canada’s surface water 
c)
An area from which all water drains downhill to a common destination. 
d)
Canada's fun water park
37.

Trenches occur at _____________ boundaries.

a)

subduction

b)

transform

c)

divergent

d)

convergent

38.

Seawater has a salinity of about 3.5% (35 g). According to the graph, what temperature will seawater freeze?

a)

0oC

b)

-2oC

c)

15oC

d)

-20oC

39.

The sinking of a converging tectonic plate into the mantle.

a)

subduction

b)

transsform

c)

divergent

d)

convergent

40.

Name ocean feature

a)

seamount

b)

trench

c)

guyot

d)

continental slope

41.

Identify F

a)

seamount

b)

trench

c)

guyot

d)

continental shelf

42.

Identify D

a)

rift valley

b)

trench

c)

mid-ocean ridge

d)

continental slope

43.

Identify A

a)

continental slope

b)

trench

c)

mid-ocean ridge

d)

continental shelf

44.

Identify B

a)

continental slope

b)

guyot

c)

seamount

d)

continental shelf

45.

Identify C

a)

continental shelf

b)

trench

c)

seamount

d)

abyssal plain

46.

Identify E

a)

continental shelf

b)

island

c)

seamount

d)

guyot

47.

Gyres are

a)

air currents

b)

deep currents

c)

surface currents

d)

ionosphere

48.

This is a diagram of

a)

air currents

b)

deep currents

c)

surface currents

d)

ionosphere

49.

This is a diagram of

a)

air currents

b)

deep currents

c)

surface currents

d)

upwelling

50.
People depend on ocean organisms for __________________.
a)
minerals
b)
fuels
c)
food and water
d)
All of these choices
51.
Fisheries renew themselves naturally each year, but __________________ has caused a shortage of fish in some areas.
a)
overfishing
b)
catch limits
c)
global warming
d)
aquaculture
52.
Fuels such as ________________ are created naturally over the course of hundreds of millions of years from the remains of dead marine organisms.
a)
coal
b)
nuclear material
c)
oil and natural gas
d)
wood
53.
_________________, the farming of salt and freshwater organisms, is increasingly common.
a)
Aquaculture
b)
Fisheries
c)
Surf fishing
54.
Although some ocean pollution is the result of natural occurrences, most pollution is related to _______________.
a)
global warming
b)
human activities
c)
ozone depletion
d)
upwelling
55.
Fresh water can be produced by removing the salt from ocean water using a process called ______________.
a)
salt water cleanup
b)
desalination
c)
water purification
d)
wastewater treatment
56.
The best way to keep the ocean clean is to ______________________. 
a)
skim trash regularly
b)
stop using the ocean as a resource
c)
establish regulations for safety and environmental regulations
d)
start a war to take over the ocean as our own resource
57.
How does the Gulf Stream affect weather conditions along the eastern coast of the United States?
a)
temperatures will decrease
b)
temperatures will increase
c)
more overcast skies
d)
it does not affect the east coast at all
58.
How does the Gulf Stream impact hurricane development off the coast of the southeastern United States?
a)
colder water from the Gulf Stream increases the speed and intensity of the hurricane
b)
colder water from the Gulf Stream decreases the speed and intensity of the hurricane
c)
warmer water from the Gulf Stream increases the speed and intensity of the hurricane
d)
warmer water from the Gulf Stream decreases the speed and intensity of the hurricane
59.
What happens to a current when it comes in contact with a continent or landmass?
a)
It continues over the continent
b)
It stops
c)
It changes direction
d)
It is absorbed by the land
60.
Which lists some effects of El Niño?
a)
warmer temperatures and more rain
b)
warmer temperatures and less rain
c)
cooler temperatures and less rain
61.

Which best describes El Niño?

a)

The water in the Pacific Ocean gets warmer than normal and causes fewer hurricanes to form.

b)

The water in the Pacific Ocean gets colder than normal and causes more hurricanes to form.

c)

The water in the Pacific Ocean gets colder than normal, and the flow of the jet stream is disrupted.

d)

The water in the Pacific Ocean gets warmer than normal, and the flow of the jet stream is disrupted.

62.
Which body has the greater effect on Earth's tides?
a)
Sun
b)
Saturn
c)
Moon 
d)
Venus
63.

Wha type of tide would this arrangement of earth-moon-sun create?

a)

full moon tide

b)

new moon tide

c)

neap tide

d)

spring tide

64.
What type of tides would this arrangement of earth-moon-sun create?
a)
neap tide
b)
spring tide
c)
new moon tide
d)
full moon tide
65.
How many low tides and high tides happen in a day?
a)
1 low tide, 1 high tide
b)
4 low tides, 4 high tides
c)
3 low tides, 3 high tides
d)
2 low tides, 2 high tides

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