Across
- 3. a sequence do organisms, each feeding on the next, showing how energy is transferred from one organism to another
- 4. the zone around earth where life can exist
- 5. all living things and their physical and chemical environment
- 7. an organism that makes its own energy-rich food compounds using the suns energy
- 9. visible forms of radiant energy
- 11. all non-living things in an ecosystem
- 12. an ecosystem that is maintained through natural process
- 18. the process by which sugar and oxygen is converted into carbon dioxide and water, to provide energy for the cell
- 20. the layer of gasses surrounding the earth
- 21. a representation of the feeding relationship within a community
Down
- 1. the level of an organism in an ecosystem depending on its feeding position along a food chain
- 2. an organism that obtains its energy from consuming other organisms
- 6. the process in which the sun's energy is converted into chemical energy
- 8. that travels through empty spaces
- 10. the form of energy transferred during heating and cooling
- 13. the function of a species serve in its ecosystem
- 14. the maximum population size of a particular species that a given ecosystem can
- 15. the ability to maintain an ecological balance
- 16. all living things in an ecosystem
- 17. all of earths water is solid, liquid and gas form
- 19. earth's solid outer layer