| Question | Answer |
|---|---|
| John has pea plants. He is going to test how the amount of water he gives them affects their growth. What is one constant? | Type of soil. |
| John is testing the amount of sunlight his pea plants need to grow. What would the independent variable be? | Amount of sunlight. |
| John is testing whether expensive fertilizer helps his hydrangea plants grow more than cheap fertilizer. What is the dependent variable? | Plant growth. |
| A new painkiller drug is being tested on humans. What group is the control group? | The group that is taking placebos. |
| A new painkiller drug is being tested on humans. What group is the experimental group? | The group that is taking the drugs. |
