D 95 of the class enjoys ice cream 3 develop a

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d. 95% of the class enjoys ice-cream. - 3. Develop a hypothesis to explain why your locker won’t open. 4. What are the features of a good hypothesis? Does your hypothesis contain all these features? If not, please revise your hypothesis. 5. Why is it important for a hypothesis to only refer to one variable? 6. After you conduct an experiment, you will either _____________ or ______________ your hypothesis? 7. Should researchers repeat their experiments? Why or why not? IV. Experiments 1. What is a controlled experiment? 2. What is the benefit of a controlled experiment? 3. How does sample size affect the validity of the experimental results?
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Name: ________________________________________________ Period: ____ Date: ___________ 4. What is the difference between a control group and an experimental group? 5. A researcher is testing the effects of caffeine on the heart rate of 20 people. 10 people received a 12 oz. Pepsi with caffeine, and the other 10 people received 12 oz. Pepsi without caffeine. Both groups were told to drink 2 oz. every minute.
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d 95 of the class enjoys ice cream 3 Develop a hypothesis...

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