Unit 4: Energy Flow

2. The process by which plants and animals use oxygen and sugar to produce water, carbon dioxide, and energy
6. An organism that eats only meat
7. The amount of living tissue in each trophic level
9. The omnivore or carnivore that eats the primary consumer
11. An organism that can make its own energy, such as a plant or algae
14. A community change where new populations of organisms gradually replace existing ones
15. A species that controls the population sizes of other organisms in its ecosystem
18. An organism that eats only plants
20. An organism that eats plants and meat
21. The general location of an organism in its food chain
23. The carnivore that eats the secondary consumer
24. The total amount of usable energy produced via photosynthesis
25. The concentration of pollutants in animal tissues as you move up a food chain

1. The process by which plants use carbon dioxide, water, and sunlight to produce oxygen and glucose
3. The mature, stable group of organisms that exists at the end of succession
4. The herbivore that eats the primary producer
5. The plant organelle responsible for performing photosynthesis
8. The organism at the bottom of a food chain, such as a plant
10. A chain of organisms that transfer energy to each other
12. An organism that has to eat other organisms for energy
13. Organisms such as fungi and bacteria that break down dead organisms into nutrients for the ecosystem
16. The plant pigment responsible for photosynthesis
17. The process by which bacteria in the soil change atmospheric nitrogen into usable forms
19. The first organisms to occupy an area during succession
22. A series of connected food chains that accurately map out all the energy relationships within an ecosystem