STEP 3: Designing an Experiment
Here is an example of how you should design your experiment:
| 1. Question: How does the amount of water affect the growth of a plant? |
| 2. Hypothesis: I think that if a plant receives too much water, then the plant will become unhealthy or die. |
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3. Experiment design: Controlled variables: Type of plant, age of plant, size of pot, amount of soil, type of soil, amount of sunlight, type of water provided, time of day that growth is measured Materials needed: 5 small, identical plastic pots, bag of soil, bean seeds, water, measuring cup, sunny window Operational definitions: Water will be measured in milliliters. Plant growth will be measured using centimeters. I will measure from the soil to tallest part of the plant. |
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