Ecosystems

2. The study of how living things interact with one another and with their environment is called
6. Burning fossil fuels.
8. When water evaporates from the leaves of plants and returns to the atmosphere.
9. Obtains energy by feeding on other organisms.
10. What is a series of events in which one organism eats another?
14. Consists of the many overlapping food chains in an ecosystem.
15. Dead organisms decay and release carbon into the atmosphere.
17. All the populations that live together in an area make up a...
18. Environmental factors which determine the types and number of organisms of a species in an ecosystem.
20. E.coli live in your intestines and help break down food.
21. An organisms specific job or role.
22. Tapeworm living inside the digestive tract of a dog.

1. All members of one species in a particular area.
3. Eats only plants.
4. What is the most important process for life Earth?
5. A process in which bacteria that live on nodules transform nitrogen gas into usable forms for plants.
7. What is a close relationship between individuals of two different species when they live together?
11. Water, sunlight, oxygen, temperature, soil
12. Living things in an ecosystem.
13. Red-tailed hawks build their nests on the saguaro cactus.
16. All the living and nonliving things that interact in an area is called...
19. The physical location where organisms live is called...
23. What percent of the energy is available to be passed on to the next level in the Energy Pyramid?