WorksheetsOcean Water
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
the ratio of the mass of a substance to the volume of the substance
a)
salinity
b)
profit
c)
density
d)
weight
2.
free-floating microscopic plants and animals
a)
plankton
b)
kelp
c)
crustaceans
d)
boats
3.
this factor is affected by the amount of solar energy an area receives and by the movement of water
a)
pack ice
b)
thermocline
c)
density
d)
ocean temperature
4.
can indicate the presence of phytoplankton in the ocean
a)
food web
b)
thermocline
c)
salinity
d)
ocean color
5.
atmospheric gases that are also the main gases found in ocean water
a)
nitrogen, oxide, methane
b)
nitrogen, carbon monoxide, flatulence
c)
nitrogen, oxygen, carbon dioxide
d)
oxygen, methanol, ketone
6.
a layer in a body of water in which water temperature drops with increased depth faster than it does in other areas
a)
thermocline
b)
incline
c)
saline
d)
decline
7.
important resources supplied by the ocean
a)
minerals, sediments, salt
b)
food, minerals, fresh water
c)
salt, humus, oxygen
d)
fresh water, nodules, salt
8.
major pollutants in the ocean
a)
herbicide, insecticide, rainbows
b)
DDT, salt, plankton
c)
plankton, acid, nodules
d)
mercury, insecticide, and DDT
9.
a measure of the amount of dissolved solids in a given amount of liquid
a)
DDT
b)
plankton
c)
salinity
d)
icee
10.
a floating layer of sea ice that completely covers an area of the ocean surface
a)
pack ice
b)
titanic
c)
ice fishing
d)
glaciers
11.
Marine organisms help maintain the chemical balance of ocean water by removing nutrients and
a)
returning other nutrients and gases to the water
b)
producing bacteria that destroy pollutants
c)
adding no new elements to the water
d)
introducing minerals and trace elements to the water
12.
Plankton can be called “the foundation of life in the ocean” because they
a)
are marine organisms that need sunlight
b)
live in the upper 100 m of water
c)
form the base of complex food webs in the ocean
d)
are one of three main food sources in the ocean
13.
This type of ocean water dissolves gases most easily
a)
cold
b)
warm
c)
shallow
d)
salty
14.
Why is the ocean called a carbon sink?
a)
Ocean water destroys trace carbon elements.
b)
Organisms in the water release carbon dioxide into the air.
c)
Ocean water dissolves carbon dioxide from the atmosphere.
d)
Ocean water becomes saltier with high carbon levels
15.
In the benthic zone of the ocean, you would most likely find
a)
dolphins
b)
whales
c)
swordfish
d)
starfish
16.
In the pelagic zone of the ocean, you would most likely find
a)
sponges
b)
tuna
c)
worms
d)
brachiopods
17.
Which of the following items is NOT a means of obtaining fresh water from the ocean?
a)
aquaculture
b)
desalination
c)
freezing
d)
reverse osmosis desalination
18.
Which of the following sea life is an example of nekton?
a)
oysters
b)
cod
c)
plankton
d)
sea stars
19.
Which of the following sea life is an example of benthos?
a)
plankton
b)
dolphins
c)
squid
d)
crabs
20.
The most valuable resource found in the ocean is
a)
salt
b)
fish
c)
petroleum
d)
trace elements
100 %
