Across
- 4. the act of stopping something bad from happening
- 6. the distance between two waves of light or sound
- 12. giving off light without heat
- 14. when a body of water becomes too rich in nutrients
- 15. the way in which something is shared out among a group
- 16. to grow or produce a lot of something very quickly
- 18. concentrated on a specific area of study or work
- 19. all the plants and animals in an area and their relationship
Down
- 1. destroyed or damaged something very badly
- 2. more powerful or important than others
- 3. to grow or develop very successfully
- 5. to pass into or through something
- 7. to stop a fire from burning
- 8. the act of one animal hunting and killing another for food
- 9. impossible to see
- 10. catching too many fish so that there are not enough left
- 11. the exchange of information or ideas
- 13. the practice of growing only one type of crop in an area
- 16. natural substances that give color to plants or animals
- 17. to send out something such as light heat or a noise