B4 Crossword

2. The process of water in clouds becoming heavy and falling as rain, snow or hail
5. A form of carbon excavated from the ground and used as a source of energy (two words)
6. A relationship where both organisms benefit
8. A small animal that shreds dead, organic material into smaller pieces
10. A non-living factor
16. The process of water moving through gaps in soils and rocks
18. An abiotic factor that affects the quality of soil
21. All of the living things and physical conditions in an area
22. The process by which carbon dioxide is produced from fossil fuels
26. The gas taken in from the atmosphere by plants for photosynthesis (two words)
27. An abiotic factor that controls the activity of enzymes and photosynthesis
28. The total number of organisms of a species
29. All the organisms within an ecosystem
30. Waste products produced by the body are usually lost through this process
31. A key element that is used to make DNA and protein
33. A type of bacteria that convert nitrogen from the air into a form that can be used by plants (two words)

1. An abiotic factor that affects the success of plant species (two words)
3. A relationship between a prey and a predator
4. An organism that makes their own food via photosynthesis
7. The form of nitrogen that is released from dead plants and animals after decomposition
9. A carbohydrate made by plants during photosynthesis
11. An organism that must consume other organisms for energy
12. The name for each step in a food chain (two words)
13. One of the only processes that can take carbon dioxide out of the atmosphere
14. A relationship where one organism benefits and one suffers
15. A group of consumers that gain their energy from dead or decaying matter
17. How different organisms depend on each other within a community
19. The mass of living material in an organism
20. A type of interaction that takes place between organisms in an area when resources are limited
23. The area in which organisms live
24. The form of nitrogen that plants take up from the roots to make proteins and DNA
25. Undigested material that is usually lost as faeces
32. A living factor