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6 Written Questions

6 Multiple Choice Questions

  1. time for half # of radioactive atoms to change (decay) into different type of atoms
  2. evidence left by living thing long ago; examples - tracks, tunnels, turds, nests, etc.
  3. ocean animal now extinct; used to be very common arthropod; used as index fossil
  4. comparison; younger vs. older; not exact
  5. volcanic lava layer on surface
  6. animals without backbone; earliest animals; examples - insects, jellyfish, worms

6 True/False Questions

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

          

  2. uniformitarianismgeology that happened in past, happens now, and will in future too; constant change in Earth; James Hutton idea

          

  3. mass extinctionhuge #s of living things dying off at one time; usually a tragic event causes it

          

  4. intrusionmagma squeezed up from below; younger than layers it cuts through

          

  5. birdsgone forever; examples - dinosaurs, trilobites

          

  6. law of superpositionhuge #s of living things dying off at one time; usually a tragic event causes it

          

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