Across
- 2. Found or discovered.
- 4. System The body's defence against disease.
- 5. Facts or information that show something is true.
- 8. Information given about an event or situation.
- 12. Gathered or picked up.
- 13. Contact with something.
- 14. The natural world around us.
- 15. Harmful substances released into the environment.
- 16. A poison used to kill rats and mice.
- 17. Made dirty or unsafe by harmful substances.
- 18. Small amounts taken for testing or study.
- 19. People who study a topic to learn more about it.
- 20. A careful study to discover facts.
Down
- 1. Able to let liquids or substances pass through.
- 3. Helped to cause something.
- 6. Something that shows the condition of another thing.
- 7. A group of animals or plants that are similar.
- 9. The situation or environment in which something happens.
- 10. A chemical used to kill pests such as insects, weeds or animals.
- 11. All the members of a species living in an area.