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Water Quality
Test Description: 8th Grade Water Quality Review
Instructions: Answer all questions to get your test result.
1) Which of the following indicate that a water source is healthy?
A
high turbidity, high dissolved oxygen, and high temperature
B
high nitrates, high pH, and low temperature
C
low temperature, high dissolved oxygen, and neutral pH
D
low pH, low dissolved oxygen, and high nitrates
2) Scientists test the Cape Fear River in August, and the dissolved oxygen levels are low. What is the most likely reason for this?
A
low turbidity
B
high salinity
C
high pH
D
high temperatures
3) In which conditions are fish most likely to die in a lake?
A
right after a storm with heavy rainfall
B
when the water's dissolved oxygen is high and the pH is neutral
C
when the water's turbidity is low and temperatures are in the average range
D
when the water's dissolved oxygen is low and the temperatures are higher than average
4) Which pH levels are the best for marine organisms?
A
3.0
B
1.0
C
8.0
D
11.0
5) Turbidity is
A
how cloudy or clear the water is.
B
how much hydrogen is available in the water
C
how much oxygen is dissolved in the water column
D
the amount of algae in the water
6) Fish need dissolved oxygen levels over
A
5
B
1
C
3
D
10
7) 0-6 on the pH scale is considered
A
neutral
B
acidic
C
basic
8) 8-14 in the pH scale is considered
A
acidic
B
basic
C
neutral
9) 7 on the pH scale is considered
A
acidic
B
neutral
C
basic
10) Bioindicators are
A
the number of fish living in a water source
B
temperature, pH, and turbidity measures of a water source
C
plants that survive or die in an ecosystem
D
organisms used to monitor the health of an ecosystem
*select an answer for all questions
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