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4th Grade Ocean Test

Total questions: 36

Worksheet time: 20mins

Name
Class
Date
1.

Flat, deep, and smooth part of the ocean floor. Cold temperatures are found here.

a)

Continental Shelf

b)

Abyssal Plain

c)

Continental Slope

d)

Seamounts

2.

Amount of salt found in water

a)

Photic Zone

b)

Gulf Stream

c)

Photosynthesis

d)

Salinity

3.

The amount of mass per unit of volume

a)

Density

b)

Metric Units

c)

Mass

d)

Volume

4.

Sharp underwater hill connecting the continent to the ocean floor?

a)

Ocean

b)

Coral Reef

c)

Plankton

d)

Continental Slope

5.

A cold current that moves around the world?

a)

Ecosystem

b)

Organism

c)

Deep Ocean Current

d)

Photic Zone

6.

Which of these are the deepest parts of the oceans?

a)

Continental Shelf

b)

Abyssal Plain

c)

Ocean Trench

d)

Continental Rise

7.

As the depth of the ocean water increases, the temperature...

a)

increases (warmer)

b)

decreases (colder)

8.

Where are you walking when you are wading in the ocean?

a)

Ocean Trench

b)

Abyssal Plain

c)

Continental Slope

d)

Continental Shelf

9.
In what zone does approximately 90% of all ocean life live?
a)
sunlight
b)
twilight
c)
midnight
10.
Animals that can use their bodies to make light are called _______________.
a)
magic
b)
shiny
c)
amazing
d)
bioluminescent
11.
90% of the ocean belongs in this ocean layer.  What is it?
a)
sunlight
b)
twilight
c)
midnight
12.
The ocean layers are divided by the amount of __________________ in each layer.
a)
animals
b)
salt
c)
light
d)
people
13.
What are the three motions of the ocean?
a)
continental shelf, continental rise, continental slope
b)
waves, tides, currents
14.
Surface currents are caused by ___________.
a)
temperature and salinity
b)
wind
15.
Rainfall and river runoff cause the salinity to _________________. 
a)
increase
b)
decrease
16.

How does the Pacific Ocean compare to the world's other oceans?

a)

It's the smallest

b)

It's the largest

c)

It's the hottest

d)

It's the coldest

17.
The use of sound waves to determine  the depth of the ocean is called...
a)
submarine sounding
b)
sonar
c)
satellite altimetry
d)
submersible sounding
18.
How many oceans are there in the world?
a)
7
b)
6
c)
5
d)
4
19.

Highest point of a wave

a)

Density

b)

wave length

c)

Crest

d)

wave height

20.

A chain of mountains that run through an ocean basin

a)

Deposition

b)

Mid-ocean-ridge

c)

Rip current

d)

Salinity

21.

Lowest point of a wave

a)

Low Valley

b)

Deep Valley

c)

Trough

d)

Sinkhole

22.

Horizontal distance between two crests or two troughs

a)

Wave current

b)

Wave distance

c)

Wave length

d)

Crest

23.

What is the smallest ocean

a)

Atlantic

b)

Indian

c)

Arctic

d)

Pacific

24.
Differences in the moon's and sun's pull on different sides of the Earth cause _________.
a)
gravity
b)
lunar phases
c)
tides
d)
dabbing
25.
The bulge of water on the side of the Earth closest to the moon produces ___________.
a)
high tide
b)
low tide
c)
neap tide
d)
spring tide
26.
How many high tides are there in Myrtle Beach every day?
a)
One
b)
Two
c)
Three
d)
Four
27.
Where is ocean water the densest.
a)
The surface
b)
The middle
c)
The bottom
d)
Lake Michigan
28.
Two types of ocean currents are
a)
local and global
b)
sea and land
c)
surface and deep
d)
warm and cold
29.
Warm ocean currents generally come from
a)
The North Pole
b)
The South Pole
c)
The Equator
d)
Both A and B
30.
Name the ocean labeled 5?
a)
Pacific Ocean
b)
Atlantic Ocean
c)
Indian Ocean
d)
Southern Ocean
31.
A ___________________ is an underwater vehicle built of materials that resist pressure.
a)
gyre
b)
submersible
c)
zone
d)
seamount
32.

A mass of moving ocean water

a)

Upwelling

b)

Ocean currents

c)

Density

d)

El Niño

33.

What is a thin, narrow wall built from the shoreline into the ocean?

a)

barrier island

b)

dredging

c)

jetty

d)

sea wall

34.
A severe storm would be most likely to damage a coastal area by causing 
a)
erosion
b)
earthquakes
c)
pollution
d)
volcanoes
35.
What are small hills on a beach called that have been created by blowing wind? 
a)
beach
b)
dunes
c)
hills
d)
waves
36.

Most ocean waves are formed by

a)

earthquakes

b)

landslides

c)

impacts of cosmic bodies

d)

wind

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