Across
- 3. Keeping the surroundings
- 5. An illness
- 7. To make something impure or unsuitable
- 8. A chemical substance for removing dirt
- 9. A chemical liquid that destroys bacteria
Down
- 1. Getting rid of by throwing away
- 2. A very small organism that causes a disease
- 4. Unavoidable danger
- 6. Rubbish or waste
- 10. When another organism enters your body