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WorksheetsData in the Classroom - Water Quality
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
The Chesapeake Bay and the San Francisco Bay are two of the largest estuaries in the United States.
They are estuaries because ….....
They are estuaries because ….....
a)
they contain an abundance of sea horses
b)
they are partially enclosed by land and contain a mix of salt and fresh water
c)
they are deep, freshwater inlets
d)
they are narrow passages of water connecting two bodies of water
2.
Special places within many of our nation’s estuaries are protected, much like the public lands protected by our national park system. These protected areas are called....
a)
National Wilderness Areas
b)
National Marine Sanctuaries
c)
National Monuments
d)
National Estuarine Research Reserves
3.
Water quality parameters include all of the following EXCEPT:
a)
Wildlife abundance
b)
Temperature
c)
Salinity
d)
Dissolved oxygen
4.
By monitoring
the water quality
in an estuary,
scientists can …....
the water quality
in an estuary,
scientists can …....
a)
track weather patterns
b)
track fish populations over time
c)
understand the impacts of severe storms, drought or sewage spills
d)
predict when a storm will hit the coast
5.
What is salinity?
a)
the amount of dissolved salts in water
b)
the amount of dissolved gases in water
c)
the amount of phytoplankton in water
d)
a measure of the clarity of the water
6.
On March 10, 2016, the salinity in this location ranged between ___ and ___.
a)
16 and 21 ppt
b)
14 and 22 ppt
c)
15 and 21 ppt
d)
15 and 20%
7.
In an estuary, salinity may vary due to all of the following EXCEPT:
a)
A rain storm
b)
Tides
c)
A volcanic eruption
d)
The inflow of fresh water from rivers
8.
Fish and other aquatic organisms need oxygen to survive. One way that dissolved oxygen enters the water is through ______.
a)
respiration
b)
an increase in pollution
c)
photosynthesis by aquatic plants
d)
excretion
9.
Dissolved oxygen levels typically peak during daylight hours because .....
a)
plant plankton produce oxygen as a by-product of photosynthesis.
b)
plant plankton consume oxygen as a by-product of photosynthesis.
c)
fish need less oxygen during the day
d)
fish need more oxygen during the day
10.
In this estuary, what time of year is dissolved oxygen typically the highest?
a)
Spring
b)
Summer
c)
Fall
d)
Winter
11.
In the late summer,
water temperature at this location has increased while oxygen concentrations _____________.
water temperature at this location has increased while oxygen concentrations _____________.
a)
increased
b)
decreased
c)
did not change significantly
12.
The term ________ refers to low or depleted oxygen in a water body.
a)
Aquaculture
b)
Hypoxia
c)
Spawning
d)
Anadromous
13.
The number of U.S. estuaries experiencing hypoxia has greatly increased in recent decades. Hypoxia ….
a)
occurs when dissolved oxygen levels decrease to 2-3 mg/l or less
b)
can be caused by nutrient pollution
c)
is harmful to fish and other estuarine organisms
d)
All of the above
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