science icon Name ________________________________

Using the information in the data table, construct a line graph on the grid below then answer the questions.

  1. The independent variable in the experiment is ________________________________________.
     
  2. The dependent variable in the experiment is ________________________________________.
     
  3. The water temperature drops _______________ degrees between 50 and 75 meters.
     
  4. The sharpest drop in temperature is between ___________oC and ___________oC.
     
  5. If the temperature at the water surface is 24 oC at the time of the experiment, water temperature drops a total of __________Co between the surface and 200 meters.
     
  6. In this experiment, water temperature drops an average of _________oC per meter of depth.
The rate of respiration of a freshwater sunfish was determined at different temperatures by counting the number of times the gill covers of the fish opened and closed during 1 minute intervals. Data collected during the experiment is shown in the data table.

Add appropriate scales and labels to the grid, plot the data, and draw a line graph.

 
Use the completed graph to answer the following questions.

7. The experimenter controls this variable _______________________________.

8. Which title would be appropriate for this graph?

O   A. The Effect of Temperature on Rate of Respiration in Sunfish
O   B. The Relationship Between Temperature and Dissolved Oxygen
O   C. The Effect of Gill Movement on Rate of Respiration in Sunfish
O   D. The Relationship Between Sunfish Population and Temperature Change in Freshwater Habitats
9. According to the data, as the temperature increases, the rate of respiration of the sunfish
O   A. increases steadily
O   B. increases, then decreases sharply
O   C. decreases steadily
O   D. decreases, then increases sharply
10. Assume that the "normal" respiration rate for sunfish is 40 to 45, at 23 oC sunfish
O   A. need more oxygen
O   B. swim faster
O   C. eat more
O   D. gather in schools
11. Sunfish need a temperature of about ________oC to maintain their "normal" respiration rate.

12. The most probable way sunfish maintain their "normal" respiration rate is by

O   A. resting in the shade
O   B. increasing or decreasing their activity
O   C. eating more
O   D. migrating to water with the proper temperature