WorksheetsOceans Review
Total questions: 39
Worksheet time: 20mins
Name
Class
Date
1.
Approximately how much of Earth's surface is covered by water?
a)
50%
b)
30%
c)
70%
d)
40%
2.
The largest of Earth's oceans is the..
a)
Pacific
b)
Indian
c)
Atlantic
d)
Arctic
3.
Where trenches do not exist, the steep continental slope merges into a more gradual incline known as the continental..
a)
abyss
b)
rise
c)
zone
d)
rift
4.
Deep, steep-sided valleys that originate on the continental slope and may extend to the ocean basin floor are called..
a)
slope canyons
b)
abyssal plains
c)
submarine canyons
d)
trenches
5.
What technology do scientists use to measure ocean depth?
a)
sonar
b)
rope
c)
laser
d)
submersible
6.
Differences in ocean-surface height can be measured by...
a)
sonar
b)
submersibles
c)
satellites
d)
none of the above
7.
Which of the following is NOT one of the three major regions of the ocean floor?
a)
continental margins
b)
ocean basin floor
c)
coastal plain
d)
mid-ocean ridges
8.
Which of the following currents is associated with downslope movements of dense sediment-rich water?
a)
avalanche current
b)
turbidity current
c)
density current
d)
longshore current
9.
Seamounts are...
a)
volcanoes that form on the ocean floor
b)
only found in the Pacific Ocean
c)
a special type of oceanic trench
d)
submarine canyons found near Australia
10.
The gently sloping submerged surface extending from the shoreline toward the deep ocean is called?
a)
continental shelf
b)
continental slope
c)
continental rise
d)
submarine canyon
11.
Which of the following occurs at the continental margin in the Pacific Ocean?
a)
volcanic activity
b)
earthquakes
c)
plate interactions
d)
all of the above
12.
Which regions are thought to be the most level places on Earth?
a)
mid-ocean ridges
b)
abyssal plains
c)
deep-ocean trenches
d)
continental slopes
13.
Which part of the ocean is the deepest?
a)
ridges
b)
rifts
c)
trenches
d)
seamounts
14.
Where does seafloor spreading occur?
a)
at convergent plates
b)
near the ocean surface
c)
on seamounts
d)
at divergent plates
15.
What is the salinity of seawater?
a)
1.5%
b)
3.5%
c)
5.5%
d)
10%
16.
Ocean salinity is usually expressed in.....?
a)
charts
b)
chemical formulas
c)
parts per thousand
d)
parts per billion
17.
What is the most abundant salt in the sea?
a)
calcium chloride
b)
magnesium chloride
c)
potassium chloride
d)
sodium chloride
18.
What is the principal source of dissolved substances in the oceans?
a)
weathering
b)
outgassing
c)
infiltration
d)
evaporation
19.
What is the second major source of elements in seawater?
a)
Earth's interior
b)
lakes
c)
meteorites
d)
solar radiation
20.
The highest salinity would be found in which of the following areas?
a)
an area with high rates of precipitation
b)
an area with high rates of evaporation
c)
an area with plenty of runoff
d)
all of the above
21.
The ocean layer of rapid temperature change with depth is known as the...
a)
trophic level
b)
mixed zone
c)
deep zone
d)
thermocline
22.
In addition to salinity, what factor affects the density of seawater?
a)
depth
b)
latitude
c)
temperature
d)
longitude
23.
What is density?
a)
mass-per-unit volume
b)
mass-per-unit area
c)
weight-per-unit mass
d)
weight-per-unit volume
24.
Most ocean water is located in which zone?
a)
mixed zone
b)
transition zone
c)
surface zone
d)
deep zone
25.
Which of the following is NOT a zone in the three-layered structure of the ocean relating to density?
a)
surface mixed zone
b)
transition zone
c)
deep zone
d)
intertidal zone
26.
Which of the following properties most determines water's vertical position in the ocean?
a)
organic content
b)
density
c)
velocity
d)
oxygen content
27.
Which force is involved in the development of surface currents?
a)
gravity
b)
inertia
c)
friction
d)
none of the above
28.
Ocean currents that move toward the poles are ...
a)
warm
b)
cold
c)
warm in the Northern Hemisphere and cold in the Southern Hemishphere
d)
cold in the Northern Hemisphere and warm in the Southern Hemisphere
29.
The Gulf Stream affects the climate of...
a)
California
b)
Great Britian
c)
Alaska
d)
Africa
30.
What causes surface ocean currents to be deflected?
a)
deep currents
b)
the Coriolis effect
c)
Earth's revolution
d)
global winds
31.
The rising of cold water from deeper layers to replace warmer surface water is called..
a)
the Coriolis effect
b)
a surface current
c)
upwelling
d)
reflection
32.
Density currents move....
a)
horizontally
b)
vertically
c)
from north to south
d)
from south to north
33.
Which of the following can cause an increase in the density of ocean water?
a)
a decrease in temperature
b)
an increase in salinity
c)
a decrease in ocean circulation
d)
both orange and red answers
34.
According to the conveyor belt model of ocean circulation, what happens when water reaches the poles?
a)
the salinity of the water increases
b)
the salinity of the water decreases
c)
the density of the water decreases
d)
the temperature of the water increases
35.
The ocean floor contains mountain ranges, trenches, and flat regions called..
a)
abyssal plains
b)
upwelling
c)
isothermal
d)
intertidal zone
36.
Sonar is an acronym for sound navigation and ranging. True or False
a)
True
b)
False
37.
New ocean floor is formed at mid-ocean ridges as magma rises between diverging plates and cools. True or False
a)
True
b)
False
38.
What is the total amount of solid material dissolved in water?
a)
Friction
b)
Salinity
c)
Density
d)
Mixture
39.
Upwelling brings greater concentrations of dissolved nutrients to the ocean surface. True or False
a)
True
b)
False
100 %
