6 Written Questions

1. fossils usually found in this type of rock
2. one element changes over time to another element; gives off energy; used to figure out how old rocks/fossils are
3. comparison; younger vs. older; not exact
4. huge #s of living things dying off at one time; usually a tragic event causes it
5. layer eroded away, then new layers formed above
6. age of Earth based on age of oldest rocks found

6 Multiple Choice Questions

1. specific age of rock or fossil; example - rock layer A is 25 myo
   1. relative age
   2. absolute age
   3. invertebrates
   4. trilobite
2. time for half # of radioactive atoms to change (decay) into different type of atoms
   1. extrusion
   2. trilobite
   3. half-life
   4. intrusion
3. older layers = lower; younger layers = upper
   1. law of superposition
   2. mass extinction
   3. extrusion
   4. intrusion
4. living thing dies and body / parts slowly replaced by minerals; example - logs, bones, shells
   1. petrified fossil
   2. extrusion
   3. trace fossil
   4. intrusion
5. geology that happened in past, happens now, and will in future too; constant change in Earth; James Hutton idea
   1. invertebrates
   2. intrusion
   3. uniformitarianism
   4. unconformity
6. evidence left by living thing long ago; examples - tracks, tunnels, turds, nests, etc.
   1. petrified fossil
   2. trace fossil
   3. trilobite
   4. unconformity

6 True/False Questions

1. trilobite → ocean animal now extinct; used to be very common arthropod; used as index fossil

   True        False

2. extrusion → magma squeezed up from below; younger than layers it cuts through

   True        False

3. invertebrates → magma squeezed up from below; younger than layers it cuts through

   True        False

4. birds → gone forever; examples - dinosaurs, trilobites

   True        False

5. intrusion → magma squeezed up from below; younger than layers it cuts through

   True        False

6. extinct → gone forever; examples - dinosaurs, trilobites

   True        False