Science test module 6

  1. Define "catastrophism"
    The view that most of earth's geological features are the result of large scale catastrophes  such as floods, volcanic irruptions, etc.
  2. define "Uniformitarianism".
    The view that most of earth's geological features are the result of slow, gradual processes that have been at work for millions or even billions of years
  3. define "humus"
    decayed  remains of once living creatures
  4. Define "minerals"
    Inorganic crystalline substances found naturally in the earth
  5. Define "weathering"
    The process by which rocks are broken down to form sediments
  6. define "erosion"
    The process by which rock and soil or broken down and transported away
  7. Define " unconformity"
    A surface of erosion that separates one layer of rock from another
  8. Which hypothesis( Uniformitarianiam or catastrophism)
     Requires that the earth the billions of years old?
  9. what Are the three basic types of rocks?
    Sedimentary rock, igneous rock, and metamorphic rock.
  10. How is each type of rock mentioned in #3 ( sedimentary, igneous, and metamorphic rock)  formed?
    Sedimentary rock is formed from sediments  (salt, minerals, and other components of soil)  that are laid down by water or some other agent.

     Igneous rock forms from molten rock, which is usually called magma

    Metamorphicc rock is rock that has undergone change, usually due to heat and/or pressure.  Both igneous rock and sedimentary rock form metamorphic rock.
  11. what agent is responsible for laying down most of the sedimentary rock we see today ?
  12. A rock in the desert is constantly bombarded by bits of sand that are carried on the wind.  Sometimes the sand hits the rock so hard that tiny chips are broken off. As time goes on, the constant beating of the sand on the rock wears the rock down, and it gets much smaller. Has the rock experienced physical or chemical weathering?
    Physical weathering
  13. When limestone is exposed  to weakly acidic water, it breaks down, forming a gas in the process. Is this chemical or physical weathering?
    Chemical Weathering
  14. A geologist is comparing the erosion that occurs as a result of two different rivers. The first river flows quickly while the second flows slowly. Which river do you expect to cause the most erosion?
    The river that flows more quickly
  15. Two hillsides in the same community experience a very heavy rain. The first hillside is covered with grass and flowers, while the second is mostly bare. Which hillside will experience the most erosion?
    The hillside that is mostly bare
  16. What causes a river to form a Delta?
    A river forms a Delta when the sediments it is carying overflow onto the shore
  17. What kind of water is responsible for eroding underground caverns?
    Freshwater  which is also called groundwater
  18. What is the difference between a stalactite and a stalagmite?
    Stalactites hang from the ceiling, stalagmites point upward from the floor
  19. What causes Stalactites and stalagmites to form?
    The water in the caverns collect segments. When the water drips down to the floor  it carries the segments with it forming stalactites and  stalagmites
  20. Where can you find metamorphic rock  in The Grand Canyon? In the upper section ,  medium section, lower section, or the lowest section?
    The lowest section
  21. where Can you find igneous rock in the Grand Canyon ? In the upper section, the medium section, the lower section, or the lowest section?
    the lower section
  22. where Can you find sedimentary rock in the Grand Canyon ? In the upper section, the medium section, the lower section, or the lowest section?
    In the upper section
  23. If an unconformity exists between two parallel strata  of sedimentary rock, what kind of unconformity is it?
    A disconformity
Card Set
Science test module 6
A science test