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Ocean Motions and Environment

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.

What is true about oceans?

a)

Ocean water has high salinity.

b)

Ocean water has many dissolved minerals.

c)

Ocean water has low density.

d)

Ocean water has dissolved gases.

2.

Which has the greatest effect on tides?

a)

The Sun because it has a greater mass.

b)

The Sun because it is 93 million miles away.

c)

The moon because it is less than 250,000 miles away.

d)

The moon because it is smaller.

3.

Surface currents moderate global temperatures by....

a)

moving warm water to the equator.

b)

moving warm water from the equator.

c)

moving cold water from the equator.

d)

moving cold water to the poles.

4.

Tidal range is the difference between high and low tides during a day. When are tidal ranges the smallest.

a)

during neap tide

b)

during spring tide

c)

when the Earth, moon, and sun are aligned.

d)

when the Earth, moon, and sun are at right angles.

5.

El Nino and La Nina effect global weather patterns. Which event increases dissolved oxygen and nutrients in the water?

a)

El Nino

b)

La Nino

6.

Weathering affects oceans by

a)

increasing dissolved salts

b)

decreasing dissolved oxygen

c)

increasing dissolved minerals

d)

decreasing salinity

7.

Deep density currents form from

a)

tides and waves

b)

wind and precipitation

c)

temperature and salinity

d)

minerals and oxygen

8.

Select the correct order

a)

continental shelf, continental slope, abyssal plain, trench

b)

abyssal plain, trench, continental shelf, continental slope

c)

trench, continental shelf, abyssal plain, continental slope

d)

continental shelf, continental slope, trench, abyssal plain

9.

What causes the Gulf Stream?

a)

Differences in density

b)

Tidal changes

c)

offshore waves

d)

wind

10.

How do minerals enter the ocean water?

a)

wave action along shores

b)

underwater volcanic activity

c)

runoff, erosion, sedimentation

d)

evaporation

11.

It's neap tide on February 14th. When will it be neap tide again?

a)

February 21

b)

February 28

c)

March 7

d)

March 14

12.

Which factors influences wave size?

a)

topography of the continental shelf

b)

distance the wave travels (fetch)

c)

duration the wave lasts

d)

strength of the wind

13.

How many high tides and low tides are there in a day?

a)

one each

b)

two each

c)

three each

d)

four each

14.

The amount of matter packed into specific volume is

a)

mass

b)

weight

c)

density

d)

pressure

15.
The size of a wave is NOT affected by the
a)
length of time the wind blows across the water
b)
salinity of the water
c)
strength of the wind
d)
distance the wind blows across the water.
16.
Horizontal distance between two wave crests is the 
a)
frequency
b)
wavelength
c)
trough
d)
wave height
17.
The lowest point on a wave is the
a)
crest
b)
trough
c)
line of origin
d)
wavelength
18.
Distance from the crest to trough of a wave is called
a)
wavelength
b)
line of origin
c)
wave height
d)
wave period
19.
A wave will increase in height when the distance over which the winds blow over the ocean
a)
increases
b)
stays the same
c)
decreases
d)
is 0 km
20.
The highest point on a wave is the
a)
crest
b)
trough
c)
line of origin
d)
wavelength
21.
When a tsunami hits the shore, it can be very destructive because of its large
a)
sandbar
b)
trough
c)
wave height
d)
frequency
22.
In the Northern Hemisphere, currents curve to the right because of the
a)
longshore drift
b)
density
c)
Coriolis Effect
d)
Moon's gravity.
23.
What is the main cause of Gulf Stream movement?
a)
Storms
b)
winds that blow now and then
c)
winds that blow in the same direction regularly
d)
the moon's gravity
24.
A major warm ocean current flows along a coastal area.  What type of climate would you most likely find in the area influenced by the current?
a)
cool and dry
b)
mild and wet
c)
extremely hot and dry
d)
extremely cool and wet
25.
Most currents that flow on the western side of a continent are usually
a)
warm
b)
irregular in motion
c)
cold
d)
moving toward the poles
26.
Currents that flow FROM the poles towards the equator are usually
a)
warm
b)
cold
c)
irregular in motion
d)
no specific temperature
27.
Currents that flow from the equator toward the poles are usually
a)
warm
b)
cold
c)
irregular in motion
d)
no specific temperature
28.
Surface currents and waves are caused mainly by
a)
density differences
b)
winds
c)
the Coriolis effect.
d)
the moon's gravity
29.
Tides are caused by
a)
strong winds that blow over ocean waters.
b)
the interaction of Earth, the moon and the sun.
c)
the shifting of the plates on the ocean floor.
d)
variations in the salinity of ocean water
30.
High tide occurs two times a(n)
a)
hour
b)
month
c)
day
d)
year
31.
If tides alternate from high to low and there are two of each type of tide a day, about how many hours will generally be between each different tide?
a)
2 hours
b)
6 hours
c)
12 hours
d)
24 hours
32.
If the first HIGH tide of the day occurs at 1:00 A.M., the next high tide will come closest to
a)
7:00 AM
b)
7:00 PM
c)
1:00 PM
d)
1:00 AM
33.
The name given to tides that occur during a new and full moon are called?
a)
low tides
b)
high tides
c)
neap tides
d)
spring tides
34.
Which of the following is true of El Niño?
a)
Scientists fully understand the conditions that create El Niño
b)
El Niño affects only the ocean, not the land
c)
El Niño can cause severe storms and can prevent upwelling in certain areas.
d)
El Niño usually occurs twice a year.
35.
A technique that uses sound waves to measure the depth of the ocean floor is
a)
dredging
b)
sonar
c)
SCUBA
d)
weighted lines

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