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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?

Ahigh turbidity, high dissolved oxygen, and high temperature Blow temperature, high dissolved oxygen, and neutral pH Chigh nitrates, high pH, and low temperature Dlow 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?

Ahigh temperatures Bhigh pH Chigh salinity Dlow turbidity

3) In which conditions are fish most likely to die in a lake?

Awhen the water's dissolved oxygen is low and the temperatures are higher than average Bright after a storm with heavy rainfall Cwhen the water's turbidity is low and temperatures are in the average range Dwhen the water's dissolved oxygen is high and the pH is neutral

4) Which pH levels are the best for marine organisms?

A11.0 B3.0 C8.0 D1.0

5) Turbidity is

Ahow much hydrogen is available in the water Bthe amount of algae in the water Chow cloudy or clear the water is. Dhow much oxygen is dissolved in the water column

6) Fish need dissolved oxygen levels over

A1 B3 C5 D10

7) 0-6 on the pH scale is considered

Aacidic Bneutral Cbasic

8) 8-14 in the pH scale is considered

Aneutral Bbasic Cacidic

9) 7 on the pH scale is considered

Aneutral Bacidic Cbasic

10) Bioindicators are

Athe number of fish living in a water source Bplants that survive or die in an ecosystem Ctemperature, pH, and turbidity measures of a water source Dorganisms used to monitor the health of an ecosystem

*select an answer for all questions

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