Energy Resources

2. Autotrophs usually make their energy through the process of ____.
7. An organism that consumes only plants to get their energy
9. An organism that feeds on decaying or unwanted materials
10. A ____ is a diagram of many overlapping food chains showing the relationships between organisms within an ecosystem
12. When the wolf population decreased, the vegetation population ____.
16. Plants are an example of a ____, which use the sun to provide energy to the herbivores
17. An organism that makes its own energy is called an ____.
20. the first source of food energy in a food web comes from the ____.
21. This type of organism relies on feeding on other animals as a way to get its energy

1. When an organism plays a significant role in the survival other other species within an ecosystem, the organism is called a ____ species
3. A ____ is an organism that gets its energy by eating plants and animals
4. If you remove the food supply for an organism and it is forced to share food with another animal, the competition between them will ____.
5. Herbivores are considered ____ level consumers
6. An organism that relies on eating other organisms to get energy is called a ____.
8. break down dead organic material and return nutrients to the soil for producers
11. When an organism is an omnivore, which level consumer is it likely to be?
13. A living thing that gets its energy by eating other living things is called an ____
14. what is the main source of energy for producers?
15. the beaver population is crucial to an ecosystem because they build ____.
18. A ____ is an example of a heterotroph.
19. If you remove a keystone, what happens to the biodiversity of an ecosystem?