science final

  1. ecology
    study of how organisms interact with eachother
  2. abiotic
  3. biotic
  4. individual
    certain plants
  5. population
    indivudauls of a single species that occuoies a given area
  6. comunity
    consists of all ordanismes that live within a given area
  7. ecosysteam
    of all the organisms that live within a given area and abotioic factor
  8. what is a food chain or food web
    a digram of different feesing levels:shows what eats what
  9. trophic level
    each feeding level
  10. producers
    make food,usually by protosythesis
  11. consumers
    an organism that eats another organism
  12. first level
    eats producers
  13. second level
    eats a frist level consumer
  14. decomposer
    consumers dead organisms
  15. niche
    is the total set of biotic and abictic resoures used by a species in a commumity
  16. symbiosis
    occures when 2 species live in close assoeiation
  17. parasitism=
    • 1. benifets one species and harms the other
    • 2.benefits one species and has no effect on the other.
    • 3.benefits
  18. biomass
    the amount of organic matter in an ecoysytem
  19. primar productivity
    the rate at which an ecoysytems producers make biomass
  20. energy pyramid
    diagram showing the flow of energy
  21. tropical rain forests
    close to equator ,warm very large amounts of rain,very biodiverse
  22. temperate forests
    found in areas with 4 distnct seasons temperture varies,large amounts of rain, tress shed leaves, makes good farmland
  23. coniferous forests
    evergreen forest long winter short summer pretty dry not fertile wood used by loggers
  24. tunda
    cold little precipitation no trees little biodiversity
  25. savanna
    tropical grasslands warm long dry seasons grass covered with scattered trees
  26. temperate grasslands
    4 seasons,varying temperature,little rainfall,good farmland
  27. chaparral
    mild rainly wnters hot dry summers small tresss and shrubs drought and fire common
  28. deserts
    little precipitation
  29. freshwater
    incluse the still waters of lakes and pond and the flowing water of rivers and streams
  30. saltwater
  31. estuary
    areas where freshwater joins ocean
  32. law of consention of mater or mass
    materials that make up the bitoic and abiotic world are recycled created or destroyed
  33. biograochemical cycles
    the movement of different substances around earth,going back and forth between biotic and abiotic world
  34. the water cycle
    sun evaportaes water into the atmosphere------>rain falls on land and water---->ran of canies water to resrvoirs
  35. carbon cylce
    • -carban in atmosphere is usally part of co2
    • -palnts take in co2----->convert to glucose during phohsyn
    • -all organisms in food chain use qluecose for energe
    • -make co2 and ecxreate it back to atmosphere
  36. the nitrogen cycle
    • taken in by plants with bacteria that converts ito ammoniun
    • other bacteria change ammonium to mitrate
    • nitrates taken in plants moves up food chain
    • back to soil after excretion or death ----> ammonium goes back to atomphere as nitrogen
  37. crust
    is the earths surface layer
  38. mantle
    is the earths thickest layer rocks that protect the earth core
  39. core
    at the center of the eath lies the core has a radius
  40. contiental drift
    wegeners hypothesis sttes that the world contienets are in motion
  41. pangaea
    contients joined together in a single land of mass a supercontient
  42. plate tectonics
    • is the unifying theroy that explains the dramatic changing surface features of the earth
    • -theory that expalins the changing surface of the earth
  43. dicergent boundaries
    plates moving away form each other

  44. convergent boundaries
    plates move toward eachother

  45. transform fault boundaries
    plates slide past eachother
  46. indertia
    how much an object resists chaning its motion
  47. mass
    the amount of matter an object has
  48. weight
    force upon an object due to gravity
  49. volume
    how much space an object take up
  50. density
    a measure of how much mass takes up a given space
  51. force
    a push or a pull on an object
  52. net force
    the total of all of the forces acting on an object
  53. vector quantity
    has both magnitude and direction
  54. equilibrium rule
    this occurs when the net force on an object is zero
  55. support force
    an upward force opposite to the force of gravity
  56. friction
    when one object rubs against something else
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science final
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