Using the Scientific Method

A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his flowers because of the detergent being used to wash their cars. The soap runs into a stream that goes near his flower beds. As an inquiring scientist, you want to find out whether soap can affect flower growth. You will need to set up your experiment (using the animation below) and publish your findings (see questions below).

Design Your Control Group Design Your experimental Group

Publish (on a separate page, answer the following questions)

1. Write your hypothesis (should be in a complete sentence and describe what exactly is being tested)
2. Describe your control group and your experimental group with regards to what variables were used in each.
3. Create a data table to show your results. This table should include an average for your experimental and control group
4. Explain why you need a control group.
5. Explain why an average is needed to compare your results.