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of 18 available terms

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6 Written Questions

6 Multiple Choice Questions

  1. layer eroded away, then new layers formed above
  2. older layers = lower; younger layers = upper
  3. volcanic lava layer on surface
  4. time for half # of radioactive atoms to change (decay) into different type of atoms
  5. living thing dies and body / parts slowly replaced by minerals; example - logs, bones, shells
  6. huge #s of living things dying off at one time; usually a tragic event causes it

6 True/False Questions

  1. extinctvolcanic lava layer on surface

          

  2. radioactive decayone element changes over time to another element; gives off energy; used to figure out how old rocks/fossils are

          

  3. invertebratesanimals without backbone; earliest animals; examples - insects, jellyfish, worms

          

  4. uniformitarianismlayer eroded away, then new layers formed above

          

  5. trace fossilliving thing dies and body / parts slowly replaced by minerals; example - logs, bones, shells

          

  6. trilobitetime for half # of radioactive atoms to change (decay) into different type of atoms

          

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