5 Written Questions

1. footprints or animal tracks
2. carbon deposit
3. approximate age
4. variation in number of neutrons
5. organism that lived in a wide area for a short time

5 Multiple Choice Questions

1. imprint of a once living organism
   1. fossil
   2. isotope
   3. mold
   4. cast
2. remains replaced by minerals
   1. trace fossil
   2. original remains
   3. petrified remains
   4. index fossil
3. amount of time for half of a substance to breakdown
   1. cast
   2. isotope
   3. half-life
   4. mold
4. exact age
   1. absolute age
   2. radioactivity
   3. isotope
   4. relative age
5. remains of a once living organism
   1. mold
   2. fossil
   3. cast
   4. fossil fuels

5 True/False Questions

1. original remains → amber or frozen remains

   True        False

2. law of superposition → carbon deposit

   True        False

3. radioactivity → breakdown of unstable isotopes into stable atoms

   True        False

4. cast → sediments fill a mold

   True        False

5. fossil fuels → natural gas, oil and coal

   True        False