Across
- 4. a _____ organism is used in place of organisms that may be difficult to study
- 6. A hypothesis that has been rigorously tested, never rejected
- 7. the outcome of the change of the independent variable
Down
- 1. the factor changed in an experiment
- 2. an educated prediction
- 3. this type of group is not manipulated in an experiment
- 5. an evidence based approach to understanding our world
- 8. this type of group is manipulated in an experiment