Science7 21

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squirty99
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155577
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Science7 21
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2012-05-26 18:41:07
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Science7 21 animal environment
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Science7 21
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  1. -Organism-
    A living thing.-
  2. Habitat-
    An environment where organism have shelter, food, water, and other life essentials
  3. Biotic factor- -
    The living and non living parts of a habitat.
  4. Abiotic factor-
    The non living parts of a habitat.
  5. Photosynthesis-
    the process where the sun gives energy to plants
  6. Species-
    Organisms of the same kind that mate mate and reproduce offspring
  7. Population-
    All the members of a species in the same area.
  8. Community-
    All the different populations in an area.-
  9. Ecosystem-
    The community of organisms that live in a particular area, along with non living surroundings
  10. Ecology-
    The study of how living things interact with each other and their environment.
  11. -What needs are met by an organism's environment?
    Food, water, shelter, living space.
  12. -What are the two parts of an organism's habitat with which it interacts?
    Abiotic and biotic factors
  13. What are the levels of organization within an ecosystem?
    Organism, population, community.
  14. Estimate-
    An approximation of a number based on reasonable assumptions.
  15. Birth rate-
    The number of births in a population in a certain amount of time.
  16. Death rate-
    The number of deaths in a population in a certain amount of time
  17. Immigration-
    Moving into a population
  18. Emigration-
    Moving out of a population
  19. Population density-
    The number of individuals in an area of a specific size
  20. Limiting factor-
    An environmental factor that causes a population to decrease.-
  21. Carrying capacity
    The largest population that an area can support.
  22. How do ecologists determine the size of a population?
    Research and tagging.
  23. What causes populations to change in size?
    Birth and death.
  24. -What factors limit population growth?
    Food, water, living space, and weather.
  25. Natural selection-
    A characteristic that makes an organism suitable for its environment
  26. Adaptations-
    The behaviors and physical characteristics that allow organisms to fit in with its environment.-
  27. Niche-
    The role of an organism in its habitat,
  28. Competition- The struggle between organisms to survive as they attempt to use the same limiting factors.-
    The struggle between organisms to survive as they attempt to use the same limiting factors.
  29. -Predation-
    An interaction in which one organism is killed by another for food purposes.
  30. Predator-
    The organism that does the killing.-Prey- The organism that is killed
  31. Prey-
    The organism that is killed.-Symbiosis- A close relationship between 2 species that benefits at least one of the species.-
  32. Symbiosis-
    A close relationship between 2 species that benefits at least one of the species.-
  33. Mutualism-
    A relationship in which both species are benefited.
  34. Commensalism-
    A relationship in which one of the species benefits and the other is neither helped nor harmed.
  35. Parasitism-
    Involves one organism living on or inside another organism and harming it.-
  36. Parasite-
    The organism that lives on the other organisms back.
  37. Host-
    The organism that has the parasite on its back.
  38. -How do an organism's adaptations help it to survive?
    They are used to the environment around it.-
  39. What are the major ways in which organisms in an ecosystem interact?-
    sound, scent, and movement.-
  40. What are the three types of symbiotic relationships?-
    mutualism, commensalism, and parasitism.
  41. -Succession-
    The series of predictable changes that occur in a community.
  42. Primary succession-
    The series of changes that occur in an area where no soil or organisms exist.
  43. Secondary succession-
    The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist.
  44. How do primary and secondary species differ?
    Primary is where no organisms live and secondary is where organisms are still living and exist.

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