A student wanted to answer the question, “How does temperature affect the rate of an enzyme reaction?”. She decided to test the temperatures of 10degC, 20degC, 30degC, 40degC and 50degC. She would add 10 mL of enzyme to 50 mL of reactants. She measured the time it takes for the bubbling reaction to stop.

1. What is the independent variable?
2. What is the dependent variable in the experiment above?
3. How many treatments did she have?

Question

A student wanted to answer the question, “How does temperature affect the rate of an enzyme reaction?”. She decided to test the temperatures of 10degC, 20degC, 30degC, 40degC and 50degC. She would add 10 mL of enzyme to 50 mL of reactants. She measured the time it takes for the bubbling reaction to stop.

1. What is the independent variable? 
2. What is the dependent variable in the experiment above?
3. How many treatments did she have?