Unit 1 Topic 5-7 Crossword

4. a species brought into an ecosystem by accident
5. the process where water vapour changes to a liquid
10. ecosystem ____________ means checking the condition of an ecosystem
12. the process in which water evaporates from an organism
14. a part of the carbon cycle
15. rain the occurs when pollution is in high levels in the air
16. the gradual process when some species replace others in an ecosystem
18. the type of succession that happens in an area that was previously bare like rock
20. the process where water condenses and falls as rain, sleet, snow, and hail
22. the process where a liquid changes into water vapour
23. water in the soil

1. the continuous movement of water through an ecosystem
2. when pollutants enter a food chain and collect at the top
3. the breaking down of dead matter
6. the scientific term for a species that has very low population numbers
7. the process where plants make their own food using sunlight
8. the type of succession that happens in an area that previously had organisms
9. the cycle that circulates carbon around ecosystems
11. a species that helps monitor the health of an ecosystem
13. a substance in the environment that cannot be broken down, stored, or recycled
17. when an organism no longer exists anywhere in the world
19. water that runs off the ground into lakes, rivers, or streams
21. a type of pest control using a pest's natural enemies