Chapter 19

3. organism that eats both plants and meat/animals
4. process of turning nitrogen gas into nitrogen compounds so they can be useful
6. once the water cools, it becomes liquid through the process of _____________________
7. gas that makes up 78% of earth's atmosphere
8. water leaves the earth and goes into the atmosphere as a water vapor
11. soil converts nitrogen compounds back to nitrogen gas so that the gas can go back to the atmosphere
12. continuous movement of water from the earth to the atmosphere and back to earth again
14. one organism eats another
15. passing of materials and energy from producers through consumers
18. organism that only eats meat or other animals
19. chart used to show how energy flows through a food chain
21. water from the clouds returning to earth

1. layers that an energy pyramid is divided into
2. plants absorb the nitrogen compounds from soil to make proteins
4. two organisms live together, one benefits, and the other is not affected
5. all the interrelated food chains that are possible in an ecosystem
9. two organisms have similar lifestyles and they compete for resources
10. part of the carbon and oxygen cycle when dead organisms are decomposed by organisms such as bacteria and fungi
13. organism that eats only plants
16. two organisms that don't positively or negatively impact each other
17. two organisms live together and one harms the other
20. two organisms live together and both benefit from the relationship