Across
- 1. Short form used to measure air quality.
- 2. The body’s ability to fight diseases.
- 4. An organism that lives on or inside another organism and gets nourishment from it.
- 7. The first widely used antibiotic discovered by Alexander Fleming.
- 9. Materials that are generally shiny and good conductors of heat and electricity.
- 10. A condition causing frequent loose stools.
Down
- 1. Medicines used to kill or stop the growth of bacteria.
- 3. The gas essential for breathing.
- 5. A pure substance made of only one kind of atom.
- 6. A combination of substances that are not chemically joined.
- 7. A disease-causing microorganism.
- 8. A substance formed when two or more elements chemically combine.