Fish Kill Unit Part 2
Study Guide LT 1-4
LT – 1 I can define macro invertebrate and can explain how they are used to measure water quality.
1. Define benthic, macro, and invertebrate.
2. Describe how macro invertebrates can be used to determine water quality. (Make sure to
explain each Group and how results can be interpreted).
3. A macro sample contains the following organisms. Calculate the cumulative index value. Show
your work. Describe the water quality based on the cumulative index value using your bio
assess form on (p.2) in your journal.
Group 1
Group 2
Group 3
5 types
3 types
3 types
4.
A macro invertebrate sample contains the following organisms. Calculate the cumulative index
value. Show your work. Describe the water quality based on the cumulative index value using
your bio assessment form on (p. 2) in your journal.
Group 1
Group 2
Group 3
2 types
2 types
2 types
LT – 2 I can define dissolved oxygen and can explain a variety of circumstances that cause D.
O. levels to change.
Use your Etch a Sketch Notes to answer the questions.
5. What is the minimum level of oxygen needed by most aquatic organisms?
6. List and explain three ways that oxygen can get dissolved in water.
7. Explain why D.O. levels go up during the day and down at night in streams with aquatic
vegetation.
8. What kind of relationship exists between dissolved oxygen and water temperature? Explain
what is meant by this type of relationship.
9. What kind of relationship exists between dissolved oxygen and pH? Explain what is meant by
this type of relationship.
10. List and explain three factors that affect D.O.?
11. What human activities can affect the amount of dissolved oxygen? List and explain.
LT – 3 I can classify common substances as acids, bases, or neutrals.
Identify the following as A (acid), B (base) or N (neutral)
____12.
____13.
____14.
____15.
____16.
____17.
____18.
A substance with a higher concentration of H+ ions than OH- ions
A substance that turns cabbage juice green
A substance that turns cabbage juice pink or red
A substance that is 2 on the pH scale
A substance that has equal numbers of H+ and OH- ions
A substance that is a 9 on the pH scale
A substance that is a 7 on the pH scale
19. Draw the pH scale. Label the numbers across the scale. Label the strongest and weakest
acid and base. List two acids, one neutral, and two bases and place them on the scale where
they belong. Put a bracket around the pH range for natural waters and label it.
LT -4 I can describe the normal pH range for freshwater and can explain the change in pH
between day and night.
20. What is the normal pH range for aquatic ecosystems?
21. Complete the chart
Time
Rate of
Photosynthesis
vs. Respiration
Oxygen in
Water
Carbon
Dioxide in the
Water
Night
Day
22. Explain why pH rises in the day and decreases at night.
pH of water