Crossword Puzzle

1. the process by which water on the ground surface enters the soil
3. recycling of inorganic matter between living organisms and their environment
5. consist of many interconnected food chains
11. the process where microscopic organisms break down nitrogen-containing chemicals from dead organic matter, into simple substances like ammonia
12. process by which green plants and certain other organisms transform light energy into chemical energy
17. living things within an ecosystem
20. the process of turning from liquid into vapor
21. non-living part of an ecosystem that shapes its environment
22. a community or group of living organisms that live in and interact with each other in a specific environment
23. group of the same species living in a similar geographical area

2. the position of an organism in the food chain
4. the process by which water vapor in the air is changed into liquid water
6. organisms that carry out the process of decay or breakdown of the dead organism
7. any toxic substance that is used to kill insects
8. made of material that comes from living organisms, such as plants and animals
9. a linear sequence of organisms through which nutrients and energy pass as one organism eats another
10. the process by which ammonia is converted to nitrites and then nitrates
12. plants that make their own food by using sunlight, air and water
13. often stored by cells in biomolecules
14. the complete disappearance of a species from Earth
15. forms in clouds when water vapor condenses into bigger and bigger droplets of water
16. the introduction of harmful materials into the environment
18. any recovery operation by which waste materials are reprocessed into products, materials or substances whether for the original or other purposes
19. something or someone who has to hunt, search, and gather their own food to eat