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  • 1. Chapter 5, Lesson 1Interactions in an Ecosystem ecosystem abiotic factor biotic factor population community ecology habitat niche producer decomposer consumer topsoil humus
  • 2. ecosystem – all the living and non-living things in an area Click to access link!
  • 3. abiotic factor – the non-living parts of an ecosystemwater minerals light air temperature soil
  • 4. biotic factor – the living parts of an ecosystemanimals plantsprotists bacteria fungi
  • 5. population – all the organisms ofthe same species living in an area
  • 6. community – all the populations living in an area
  • 7. ecology – the study of how allthings in an ecosystem interact Click to access link!
  • 8. habitat – the place where an organism lives Click pictures to access links!
  • 9. niche – the role of an organism in its community What does the species eat? What eats the species?What environment does the species need? Is the species active by night or by day? NO TWO SPECIES CAN FILL THE SAME NICHE!
  • 10. producer – an organism that producesoxygen and food like plants and algae
  • 11. consumer – animals are consumers.They eat algae, plants, or other animals.
  • 12. decomposer – organisms, such as bacteria, fungi, and worms that break down dead plants andanimals into useful things like minerals that enrich the soil.
  • 13. topsoil – the top layer of soil
  • 14. humus – partly decayed plant matter