WorksheetsHydrosphere
Total questions: 27
Worksheet time: 14mins
Name
Class
Date
1.
How much of Earth's water is unavailable for humans to consume due to its high salinity?
a)
3%
b)
23%
c)
77%
d)
97%
2.
A distinct location from which pollution is directly produced.
a)
Point source
b)
nonpoint source
c)
wastewater
d)
water pollution
3.
Many areas such as an entire farming region, a suburban community with many lawns and septic systems or storm runoff from parking lots.
a)
Point source
b)
nonpoint source
c)
wastewater
d)
water pollution
4.
When there is a single identifiable and localized source of water pollution, such as wastewater discharge into a stream.
a)
runoff
b)
drainage
c)
point source pollution
d)
non-point source pollution
5.
Water pollution that comes from many sources is considered...
a)
point source pollution
b)
nonpoint source pollution
c)
thermal pollution
d)
ocean pollution
6.
Which would a scientist expect to find in a lake that experienced a sudden increase in nitrate levels?
a)
an increase in temperature
b)
an increased number of fish
c)
an increase in dissolved oxygen
d)
an increased amount of algae and aquatic plants
7.
Which best explains the importance of pH in determining the health of a water system?
a)
Most organisms living in water are able to adapt to changing water pH.
b)
Variations in the pH of water can indicate the presence of toxicsubstances.
c)
A low pH in ground water encourages the growth of photosyntheticorganisms.
d)
Variations in the pH of water can affect the ability of water to absorbatmospheric gases.
8.
Which most likely makes fish excellent indicators of watershed health?
a)
Fish live only for a short period of time.
b)
Fish live in the water for at least a portion of their life.
c)
Fish differ in their tolerance to amount and types of pollution.
d)
Fish are frequently moving throughout different columns of water.
9.
Why is it important to monitor turbidity levels of a water system?
a)
Frogs will destroy fish eggs in murky water.
b)
Fish are better able to find food in cloudy water.
c)
Water can only be used for recreation when it is clear.
d)
Suspended particles diffuse sunlight and absorb too much heat.
10.
The local middle school has a fish pond in the courtyard. The pond water is suffering from eutrophication. Which most likely caused this problem?
a)
poor filtration
b)
direct sunlight
c)
fertilizer runoff
d)
improper cleaning
11.
Which would lead to the greatest reduction of dissolved oxygen in a lake?
a)
decreased number of fish in the lake
b)
increased number of fish in the lake
c)
increased nutrients and algal blooms
d)
decreased number of plants surrounding the lake
12.
Which best describes the relationship between temperature and dissolved oxygen in a lake?
a)
As temperature increases, dissolved oxygen increases.
b)
As temperature increases, dissolved oxygen decreases.
c)
As temperature decreases, dissolved oxygen decreases.
d)
A change in temperature has no effect on dissolved oxygen.
13.
Which is a bioindicator?
a)
current
b)
rock
c)
insect
d)
water
14.
Which government agency regulates drinking water quality?
a)
FDA
b)
EPA
c)
CDC
d)
FBI
15.
Most legislation passed by the EPA is only effective against which type of pollution?
a)
Nonpoint Source
b)
Point Source
16.
Which of the following is NOT a desired effect in streams?
a)
a pH of about neutral
b)
low salinity
c)
high temperature
d)
low nitrates
17.
High turbidity indicates poor water quality because
a)
it clogs the gills of aquatic animals and makes it difficult to breathe
b)
it makes it hard for sun to get to the aquatic plants
c)
it makes it hard for aquatic animals to find their food
d)
all are reasons high turbidity indicates poor water quality
18.
What organisms are usually used as bioindicators to assess stream health because they are sensitive to pollution and easy to catch?
a)
microorganisms
b)
bioilluminators
c)
hydrogen bonds
d)
macroinvertebrates
19.
Algal blooms can use up resources, which kills the aquatic plants. These plants are decomposed by bacteria that use up the oxygen in the water and kills all of the other organism. This process is called
a)
respiration
b)
photosynthesis
c)
digestion
d)
eutrophication
20.
Nitrates and phosphates come from fertilizers and human and animal waste. This leads to eutrophication which is the buildup of what?
a)
Plankton
b)
Algae
c)
Lily pads
d)
Weeds
21.
Having a pH of 4 means that the liquid is more ____________
a)
acidic
b)
basic
22.
If gasoline or oil or trash goes into a storm drain in the street, it goes directly...
a)
to the sewage treatment plant
b)
into the stream
c)
to groundwater
d)
none of the above
23.
Cooler water temperatures are better because
a)
Cold water holds more dissolved oxygen
b)
Cold water makes it harder for bacteria to grow
c)
Both are reasons why cool water is beneficial
24.
What effect can increased water temperature have on dissolved oxygen (DO) content?
a)
Increased temperature decreases DO
b)
Increased temperature increases DO
c)
Increased temperature has no effect on DO
d)
DO-BE-DO-BE-Doooooo
25.
The terms basic and acidity refer to what water quality indicator?
a)
pH
b)
dissolved oxygen
c)
turbidity
d)
temperature
26.
Point source pollution is more easily controlled. Why?
a)
They come from a variety of sources.
b)
They come from a single, identified source.
c)
Lots of people contribute to it.
27.
Rainbow trout are found in mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use rainbow trout in water quality testing?
a)
biological indicator
b)
invasive species
c)
nitrates
100 %
