Across
- 5. In 1809, Nicolas Appert invented ______.
- 6. The science of problem solving.
- 7. process that keeps food safe and clean
Down
- 1. How much work we get done.
- 2. when someone uses technology to solve a problem, it usually results in this
- 3. Simple invention that made it possible for people to travel further distances.
- 4. discovered by Alexander Fleming