GRADE 8 SCIENCE EXAM

Mr. McCarthy

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  1. The natural home of an organism is a:
  2. Your answer:
    biome
    micro-organism
    habitat
    niche


  3. All the rabbits living in an area can be called a(n):
  4. Your answer:
    biosphere
    ecosystem
    community
    population


  5. An example of a tertiary consumer is:
  6. Your answer:
    corn plant
    mouse
    snake
    hawk


  7. Which below is the primary consumer:
  8. Your answer:
    sun
    corn plant
    mouse
    hawk


  9. Which sampling method would be used to estimate a population of ladybugs:
  10. Your answer:
    quadrat method
    mark-recapture method
    line-transect method
    sweep net


  11. What is a relationship in which one species benefits and the other neither benefit nor is harmed:
  12. Your answer:
    commensalism
    mutualism
    parasitism
    passenger


  13. Bacteria is an example of a:
  14. Your answer:
    primary consumer
    secondary consumer
    tertiary consumer
    decomposer


  15. An organism with a wide range of tolerance can:
  16. Your answer:
    survive where environmental factors vary greatly
    survive where environmental factors do not vary greatly
    feed on many different organisms
    live in many different habitats


  17. Chocolate chip cookie dough is an example of a:
  18. Your answer:
    mechanical mixture
    solution
    pure substance
    compound


  19. Contains two or more substances, but appear to be one substance is a:
  20. Your answer:
    mechanical mixture
    solution
    pure substance
    compound


  21. Of all the states of matter, that which has the largest space between particles is a:
  22. Your answer:
    solid
    liquid
    gas
    ice


  23. Sublimation is when there is a change from a:
  24. Your answer:
    gas to a liquid
    liquid to a gas
    gas to a solid
    solid to a liquid


  25. The reverse process of condensation is:
  26. Your answer:
    sublimation
    evaporation
    freezing
    melting


  27. When something is saturated it:
  28. Your answer:
    can hold more solute
    can't hold more solute
    can hold more solvent
    can't hold more solvent


  29. During the distillation process, the material collected is called the:
  30. Your answer:
    filtrate
    solvent
    residue
    distillate


  31. The thickest layer of the Earth is the:
  32. Your answer:
    crust
    mantle
    inner core
    outer core


  33. A volcanic cone made of layers of ash and lava:
  34. Your answer:
    cinder
    shield
    composite
    fold


  35. When fossils are formed by minerals replacing original material, is called:
  36. Your answer:
    petrified
    cast
    mold
    trilobites


  37. A scientist who came up with the theory of Continental Drift:
  38. Your answer:
    Richler
    Mohr
    Wagener
    Paricutin


  39. When a rock solidifies and cools on the surface of the Earth it is said to be:
  40. Your answer:
    intrusive
    magma
    extrusive
    crystal


  41. What is the most common type of volcanic cone:
  42. Your answer:
    composite
    cinder
    shield
    fold


  43. A pure substance that cannot be broken down into other substances is called:
  44. Your answer:
    ore
    rock
    composite
    element


  45. Most of the Earth's crust is made up of:
  46. Your answer:
    igneous rock
    metamorphic rock
    sedimentary rock
    rocks


  47. What evidence would indicate that a rock sample had solidified and cooled slowly inside the Earth:
  48. Your answer:
    small crystals
    dark colour
    large crystals
    very hard


  49. Which mineral is the softest:
  50. Your answer:
    gypsum
    quartz
    diamond
    talc


  51. The absolute age of a rock sample can be estimated by which of the following processes:
  52. Your answer:
    compare fossil evidence
    relative aging
    superposition
    measuring radioactive decay


  53. Two gears that are used to increase rotational speed:
  54. Your answer:
    reducing gears
    multiplying gears
    driven gears
    parellel gears


  55. Which of these is not a simple machine:
  56. Your answer:
    screw
    pulley
    wedge
    gear


  57. Force is measured in units called:
  58. Your answer:
    joules
    newtons
    kilograms
    calories


  59. Which of these is a second class lever:
  60. Your answer:
    seesaw
    nut cracker
    scissors
    pulley


  61. Work is done on an object if:
  62. Your answer:
    A force is exerted on the object and the object moves a distance in the direction of the force
    A force is applied
    An object moves
    A person exerts a great deal of energy while pushing on an object


  63. Which of the following simple machines can only produce a force advantage:
  64. Your answer:
    class 1 lever
    class 1 and class 2 levers
    class 2 lever
    class 3 lever


  65. Which class of lever does not make lifting a load easier:
  66. Your answer:
    first class
    second class
    third class
    first and second class


  67. The process a seed sprouts into a tiny new plant:
  68. Your answer:
    vegetative reproduction
    germination
    embryo
    fertilization


  69. A type of asexual reproduction in which a new plant is produced using part of a leaf, stem, or root.
  70. Your answer:
    vegetative reproduction
    cutting
    grafting
    tubers


  71. Rows of trees planted around certain sides of fields to reduce erosion by wind is called:
  72. Your answer:
    contour farming
    strip farming
    shelter belts
    terracing


  73. A bag of fertilizer has the numbers 14-22-33, what does 33 represent:
  74. Your answer:
    33 parts nitrogen
    33 parts potassium
    33 parts phosphorus
    33 parts calcium


  75. A nutrient that promotes the growth of healthy green leaves is:
  76. Your answer:
    nitrogen
    potassium
    phosphorus
    calcium


  77. The female part of a flower is called:
  78. Your answer:
    stamen
    anther
    pistil
    petal


  79. Chemicals used to eliminate bothersome plants:
  80. Your answer:
    pesticides
    herbicides
    insecticides
    fungicides


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