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Unit 13 Review

Authored by Arlanna Beckham

Science

8th Grade

Used 19+ times

Unit 13 Review
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26 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Bioindicators (biological indicators) are used to measure the quality of water. What is a biological indicator?

any living creature

producers in aquatic environments

An organism sensitive to its environment that can indicate the quality of water.

algae

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A body of water showed a high turbidity level, high levels of nitrates and phosphates, a pH of 7.5, and low dissolved oxygen levels. Would this body of water be considered healthy?

Yes

No

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How could the use of fertilizers near the stream impact the health of a stream?

Nitrates and phosphates from fertilizer lead to algal blooms

Fertilizers are consumed by fish

Fertilizers do not impact water quality

Fertilizers use on land improves water quality

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the healthiest combination listed?

low pH, high nitrates, neutral temperature
low temperature, neutral pH and low nitrates
as many nitrates as possible, low temp and low pH
high temp, high nitrates and high pH

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do low Dissolved Oxygen levels ( 3 or below) affect organisms?

Organisms may die or have to leave if levels get too low

Organisms go through more cellular respiration

Organisms eat more

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A substance with a pH of 8.2 is a __________ base (alkali) while a substance with a pH of 2 is a __________ acid.

weak, weak

weak, strong

strong, strong

strong, weak

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following can directly increase water turbidity?

Decreased temperature

Increased pH.

Increased soil erosion

Increased DO.

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