Ecosystems and Energy

3. A diagram showing that less energy is available to organisms at higher feeding levels.
4. A diagram showing a single, linear series of steps of how energy and matter move.
6. An organism that produces its own food from the sun or chemical energy.
7. The total amount of living organic matter present at each trophic level.
9. Matter that is recycled back into the ecosystem by decomposers after an organism dies.
10. A model showing the total count of individual organisms at each level of an ecosystem (a Pyramid of __).
12. Includes all living and nonliving parts of an environment.
16. An organism that must consume other organisms to obtain energy.
17. A complex model showing all interconnected food chains and energy paths in a community.
18. A top-level predator that eats secondary consumers is a ___ consumer.
19. A consumer, such as a grasshopper, that feeds directly on producers.
20. The form in which the majority of energy is lost as it moves between levels.

1. The percentage (10%) of energy (written as a word) typically transferred from one level to the next.
2. Also known as an autotroph; these capture energy at the base of every food chain.
5. The original source of energy for most producers in an ecosystem.
8. A ___ Pyramid is a diagram representing the total weight of living tissue at each trophic level.
11. Organisms like fungi that break down dead matter and return nutrients to the environment.
13. A specific feeding step in a food chain or web where matter and energy are transferred.
14. The organism at the very top of an energy pyramid, receiving the least amount of original energy.
15. A carnivore, like a frog or spider, that eats primary consumers is considered a ___ consumer.