Across
- 2. the variable in an experiment that remains unchanged
- 4. investigation a fair test in which a control is identified, and variables are
- 5. a new product, process, or idea
- 7. a characteristic of a model that is useful or helpful
- 8. a prediction that can be tested
- 9. an observation made for the first time
Down
- 1. a condition in an experiment that can be changed
- 2. conditions that must be met
- 3. the boundary of a model
- 6. to test a hypothesis