Across
- 3. A small, useful machine or device
- 4. Happening from time to time
- 6. A place where scientists work and do experiments
- 7. A test to find out or prove something
Down
- 1. Powered by electricity, a form of energy caused by the motion of electrons and protons
- 2. A sound, motion, or other sign that sends a message
- 3. Extraordinary intellectual power, especially seen in the creative ability
- 5. An original device, system, or process