Across
- 7. a disease caused by a virus
- 8. sound navigation and ranging
- 10. sound below 20 Hz
- 11. something that can only be seen with a microscope
- 12. another word for illness
Down
- 1. sound above 20,000 Hz
- 2. scientific name for a germ
- 3. a type of microbe which can only reproduce in other cells
- 4. the distance between 2 waves
- 5. something used to see very small things
- 6. something used to measure heat
- 9. type of microbe that is a relative of a mushroom or yeast