Across
- 2. they eat only meat
- 4. plants use this to create their food
- 6. organisms that break down dead material
- 8. travels from the sun to the producers and so on
- 11. the variety of organisms in an ecosystem
- 12. when two consumers fight for food
- 13. comes from vehicles and damages ecosystems
- 14. a group of biotic an abiotic organisms in an area
- 16. the sphere of matter
- 17. all of the water on the earth is part of this
- 19. plants do this to get food
- 21. living things in an ecosystem
- 24. all biotic organisms need this to survive
- 26. when two animals help each other and they both get something out of it
- 27. they eat only plants
- 28. This layer is made of rocks and rock particles
Down
- 1. all living organisms are part of this
- 3. they get rid of forests
- 5. areas of shallow standing water that support aquatic plants
- 7. non-living things in an ecosystem
- 9. the soil below the litter layer
- 10. a shield around the earth
- 15. the lake ecosystem’s response to an excess of nutrients
- 18. they create their own food
- 20. animals that eat the plants or other animals
- 22. eats both plants and meat
- 23. when the strong hunt the weak
- 25. ecosystems in the saltwater seas and oceans