Across
- 1. The earlier timekeeping invention
- 5. The original material used for making billiard balls
- 6. The alphabet blind people use to read
- 8. A kitchen device that uses electromagnetic radiation to cook food
- 9. What separates the colours of white light
- 10. A microscope uses ____ and lenses to magnify objects
Down
- 2. A device that allows divers to breathe underwater
- 3. The element named after Poland
- 4. The grant of rights to an invention
- 7. The name of the first cloned mammal