Across
- 4. the boundary of a model
- 7. investigation procedures scientists and engineers follow to answer a question and make a claim
- 8. a new product, process, or idea
Down
- 1. a characteristic of a model that is useful or helpful
- 2. a fact or situation that can be observed
- 3. conditions that must be met
- 5. a strong effect on something
- 6. observing something for the first time