1. ENVIRONMENTAL STUDIES

2. BIOSPHERE Combined portions of Earth in which all living things exist

3. INDIVIDUAL ORGANISMS POPULATIONS COMMUNITIES ECOSYSTEMS BIOMES

4. FOOD CHAINS

5. FOOD WEBS

6. TROPHIC LEVELS

7. BIOMASS PYRAMID

8. NITROGEN CYCLE

11. HABITAT VS. NICHE

12. BIOTIC VS. ABIOTIC FACTORS

13. COMPETITIVE EXCLUSION PRINCIPLE

14. SPECIES INTERACTIONS ***Predation ***Symbiosis ***Mutualism ***Commensalism ***Parasitism

15. PREDATIONSYMBIOSIS MUTUALISM COMMENSALISMPARASITISM HUMMINGBIRD/FLOWERSEA ANEMONE /CRABWASP LARVAE/HORNWORM

16. PRIMARY SUCCESSION

17. SECONDARY SUCCESSION

18. OCEAN PHOTIC AND APHOTIC ZONES

19. ***BENTHOS***

20. POPULATION DENSITY

21. ***CARRYING CAPACITY***

22. DENSITY INDEPENDENT DENSITY DEPENDENT LIMITING FACTORS AFFECTING POPULATION DROUGHT CLIMATE EXTREMES HUMAN IDSTURBANCE COMPETITION PARASITISM DISEASE

23. RENEWABLE VS. NON-RENEWABLE RESOURCES

24. SUSTAINABLE USE: Use of natural resources at a rate which does not deplete them

25. BIODIVERSITY The sum total of the variety of organisms in the biosphere

26. HABITAT FRAGMENTATION Splitting of ecosystems

27. INVASIVE SPECIES

28. BIOLOGICAL MAGNIFICATION

29. OZONE LAYER