Across
- 6. ______________ bacteria are organisms that convert nitrogen in the air to a form that can be used by plants
- 8. Type of consumer that occupies the 3rd level of an energy pyramid
- 13. Process that plants, algae, and some bacteria use to make food using sunlight, carbon dioxide, and water
- 15. A substance in food that provides energy or helps form body tissues and is necessary for life and growth
- 16. Type of consumer that occupies the 2nd level of an energy pyramid
- 19. ______________ bacteria cause nitrogen in the soil to be released into the atmosphere as gas
- 21. One of the steps in a food chain or food pyramid
- 22. Most energy is lost as ________ when transferring through the trophic levels
Down
- 1. Gas that is produced from cellular respiration and released into the atmosphere
- 2. An environmental factor that is associated with or results from the activities of living organisms
- 3. Organism that gets energy by breaking down the remains of dead organisms or animal wastes
- 4. Amount of energy that transfers to the next trophic level
- 5. A food _________ is a a diagram that shows the feeding relationships between organisms in an ecosystem
- 7. Process by which cells use oxygen to produce energy from food
- 9. An environmental factor that is not associated with the activities of living organisms
- 10. Organism that eats other organisms
- 11. The product of cellular respiration that allows organisms to perform all life processes
- 12. A food _________ is a pathway of energy transfer through various stages
- 14. Organism that uses sunlight to make glucose
- 17. All _____________ break down sugar to get energy, and need energy to live.
- 18. Part of Earth where life exists
- 20. Organisms that assimilate nitrates so that nitrogen can enter the food web