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2010-08-04 01:25:19

earth science
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  1. what is an atom?
    matter consists of small particles
  2. what is an element
    matter made of identical atoms
  3. what is an electromagnetic wave
    one of the waves that are propagated by simultaneous periodic variations of electic and magnetic feild intensity and that include radio waves,infrared visible light, UV, xrays and gamma rays
  4. what is a wavelength?
    distance btw waves
  5. what is a galaxy
    an assembly of millions of stars, nebulas and planets
  6. what is a solar system?
    these heavenly bodies(sun planets moons asteroids and comets
  7. what is an electomagnetic spectrum?
    all of these forms of radiation are related to one another
  8. what is an electromagnetic radiation?
    many different types od electromagnetic waves.
  9. what is a the bright line spectrum?
    chemical bar code or fingerprint identitying the specific element that producesd it through the color it emits
  10. what is a spectroscope?
    whic is atool that uses prism to separate wave lengths of light
  11. what is a red shift?
    change in poistion of the spectral lines
  12. what is a doppler effect?
    change in pitch of a sound wave caused by stretching or compression
  13. what is a background radiation?
    leftover radition from the big bang
  14. what is a scientifi theories?
    are our best current explantion of observed and mesured facts
  15. LS 3
    what is subatomic particle?
    protons and nuetrons and electrons
  16. what is hydrogen helium and lithium?
    three smallest elements
  17. what is aparticle acccelerators?
    high speed particle reactors
  18. what is a nebula?
    large clouds of dust and gas
  19. what is a protostar
    ball of hydrogen gass
  20. what is fusion?
    the process where small atoms are smashed together so that their center (nuclei) merger, becoming larger atom
  21. what is a radiation pressure?
    caused by the fusion of hydrogen into helium in the core
  22. what is a main sequence star?
    stable star
  23. what is a blue giant?
    star that are big and hot
  24. what is a yello dwarf?
    • fuse hydrogen slowly
    • EX sun
  25. what is a super nova?
    a shock wave develops which bounces off the core, tearing through the layers of the star, shockwave triggers runaway nuclear fusion ar a fantastic rate adn the star explodes
  26. LS 4
    why do we need water?
    • it helps moderate climate
    • helps in reprodutions
    • it captures heat
  27. what are the other planets?
    • SUNJ
    • S-saturn
    • U-uranus
    • N-neptune
    • J-jupiter
  28. what are the inter planets?
    • earth
    • venus
    • mercury
    • mars
  29. LS 5
    what is ecology?
    the science that seeks to understand how the biotic and abiotuc parts of aregion work 2gether to make a healthy vital enviroment.
  30. what is a biosphere?
    all living organisms
  31. what is a biotic factor?
    • living organisms in an area and the recently dead organic matter
    • ex.
    • dead leaves, fallen log, animal carcass etc
  32. what is a population?
    all the members of one species in an area form
  33. what is a niche?
    the role these organisms play in the web of life
  34. what is abiotic factor?
    the raw materials of the land and wate, and conditions like the climate sunlight and tep
  35. what is a ecosytem?
    is a natural area or region mad up of all the plants animals, microbes, and otheer life forms as they interact with one another and with the physical enviroment
  36. what is a energy?
    is the ability to do work
  37. what is the law of conservation of energy?
    it states that nrg cannont be created of destroyed
  38. what is the second law of thermodynamics?
    when ever nrg changes forms some energy is lost as waste heat
  39. what is efficiency?
    the ratio of the usedful energy deliverd by a dynamic system to the energy supplied to it
  40. what is photosynthesis?
    is the process plants use to convert sunlight energy into food molecules
  41. what is chlorophyll?
    this chemical triggers the reaction taht akes carbon dioxide from thr air and combines it with water
  42. what is a glucose?
    the substance formered by photosyntheses,

    a simple sugar that is used by every type of cell
  43. what is chemosynthesis?
    the base of their food ,owas a type of bacteria that converted inorganic chemicals like hydrogen sulfide(H2s) into food molecules
  44. what is a calorie?
    the amount of heat neede to warm one gram of water one degree celsius
  45. what is a food calorie
    is equal to one thousand small calorie
  46. what is a food chain?
    the way in which an organism gets its food energy
  47. what is a producer?
    these are organisms that can manufature their own food
  48. what is a consumer?
    depend on other living things for their food
  49. what is a tropic or feeding levels?
    feeding or nutrional intake
  50. what is a decompser?
    feed on and break down dead protoplasm
  51. what is a autotrophs
    self feeders
  52. what is a carrying capacity?
    the max number of plants of animals that can be indefinitely maintained by the ecosytem
  53. what is a test group?
    the group being evaluted
  54. what is a expiremental variable?
    variable tessted for infulence of change
  55. what is a randomization?
    selcetion in an unplanned manner
  56. what is a biome?
    large scale ecosystems that have distinct types of plants, animals , miccroorganism, soil and climatic condtions
  57. what is a bio diversity?
    a vast array of diiferent living things
  58. what is a sustainability?
    the ability to adapt, survive, and grow even in a changing enviroment
  59. what is a bio mass?
    the total mass of the lving things in a region
  60. what is a habitat loss?
    loss of space for many species
  61. what is extinct?
    species dies off no longer found alive
  62. what is a competion?
    humans outcompete other organism for the resource of earth
  63. what is a climate change?
    earth being warmed or cooled
  64. what is over specializtion?
    at times nature creates a species that is so specific to one typer of food habita or behaviour taht it cannot survive even the slightest change int eh enviromet
  65. what is a monoculture?
    the lack of biodiversity