Biology terms

4. Total amount of water on a planet
5. A community of living organisms
13. Chemical element with the Symbol N
14. A living thing that has an organized structure
16. Living or once living components of a community
18. Biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose
19. The rate of production of new individuals per unit of population
23. Convert waste into a reusable material
24. An organism that eats soley meats
26. The joint action of two or more factors
28. An organism that eats plants and animals
30. The study of the relationships between living organisms
31. A diagram that shows the transfer of energy in an ecosystem
32. Organism the mostly feeds on plants

1. The outermost layer of the earth
2. One in which energy can be transferred between the system and its surroundings
3. Any organism that breaks down or eats decaying material for its energy source
6. All the nonliving factors present in an ecosystem
7. The number of organisms that an ecosystem can support
8. A chemical process that occurs in plants, algae and some types of bacteria
9. A blanket of gases that surrounds earth
10. Organisms that make their own food
11. Part of the world where life can exist
12. A group of organisms of the same species living in the same area at the same time
15. A directional predictable change in community structure over time
17. Consists of all the food chains in a single ecosystem
20. Another term for death
21. System that is completely isolated from its environment
22. The community of plants and animals that occur naturally in an area
24. An organism that cannot produce its own food and must eat other plants to gain energy
25. A chemical compound made up of carbon atom and two oxygen atoms
27. An interacting group of various species
29. You breath it