Science Grade 9:
Mr. Zajac wants to conduct an experiment to see if Red Bull energy drink makes plants grow faster. He takes plant #1 and puts it on a ledge that gets lots of sunshine. He waters this plant with 100 mL of water everyday. He takes plant #2, puts it on the ledge beside plant #1, and pours 100 mL of Red Bull on it twice a day, once when he wakes up, and once before he goes to bed. (3 marks)
a. Is this a fair test? Explain why or why not. (2 marks)
b. What would you recommend to Mr. Zajac to fix his experiment?
3. In the graph below, identify the following key features.
