1. Biotic and Abiotic Factors

2. Lesson Essential Question: What abiotic factors help organisms live & thrive? Recall that the foundation of environmental science is ecology Ecology is the study of how living organisms interact with each other and with their environment Ecology studies the interactions between biotic (living) factors and abiotic (nonliving) factors

3. BIOTIC FACTORS All the living things or their materials that directly or indirectly affect an organism in its environment (bio = life) Biotic Factors include: Organisms Their parts Their wastes Their presence Their interactions

4. ABIOTIC FACTORS All the non-living physical and chemical factors which affect the ability of organisms to survive and reproduce (a in abiotic = not, non) Abiotic Factors include: Temperature Sunlight Air Water Wind Soil

5. BIOTIC or ABIOTIC? Sandy soil Cool temperatures Cactus Flea infestation Smog Salinity Predation Feces abiotic biotic abiotic biotic

6. SUMMARY Answer the essential question in two parts: 1.List three abiotic factors that affect life on land. Explain the importance of each. 2.List three abiotic factors that affect life in water. Explain the importance of each.