Geologic Time Scale

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Across
  1. 3. the science of the study of Earth
  2. 6. the actual or exact age of a rock or fossil, or how long ago ti formed
  3. 9. in undisturbed sedimentary rock layers, older layers of rock lie beneath younger rock layers
  4. 10. describes the age of a rock or fossil in comparison to another rock or fossil
Down
  1. 1. an igneous rock that forms when magma cools and hardens after cutting through existing rock layers
  2. 2. forms of life which existed during limited periods of geologic time
  3. 4. any rock fragments that's included inside of another rock is older than the rock which it is included
  4. 5. the technique scientists use to determine the absolute age of a material
  5. 7. a gap in the rock record
  6. 8. any feature that cuts across a sequence of rocks, is younger than eveything it cuts