A group of students wanted to investigate the effect of different concentrations of a sports drink on Daphnia. Design an investigation to test the research statement. Your answer should include the following:Independent variabledependent variablethree control variablesprocedure and manipulation of variablesmethod of recording of dataethical considerations
Question
A group of students wanted to investigate the effect of different concentrations of a sports drink on Daphnia. Design an investigation to test the research statement. Your answer should include the following:Independent variabledependent variablethree control variablesprocedure and manipulation of variablesmethod of recording of dataethical considerations
Solution
Research Statement: The concentration of a sports drink affects the activity level of Daphnia.
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Independent Variable: The independent variable is the concentration of the sports drink. This is what we will be changing in the experiment.
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Dependent Variable: The dependent variable is the activity level of Daphnia. This is what we will be measuring in the experiment.
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Control Variables: a. The type of Daphnia used in the experiment should be the same throughout. b. The temperature of the environment where the experiment is conducted should be constant. c. The volume of the sports drink given to each Daphnia should be the same.
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Procedure and Manipulation of Variables: a. Prepare different concentrations of the sports drink. b. Divide the Daphnia into groups and expose each group to a different concentration of the sports drink. c. Observe and record the activity level of Daphnia.
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Method of Recording Data: a. Use a stopwatch to measure the time it takes for Daphnia to move a certain distance. b. Record the time in a table for each concentration of the sports drink. c. Repeat the experiment several times and calculate the average time for each concentration.
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Ethical Considerations: a. Ensure that the Daphnia are not harmed or killed during the experiment. b. After the experiment, return the Daphnia to their natural habitat. c. Do not waste the sports drink; use only the necessary amount for the experiment.
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