Across
- 2. when organic matter is replaced by minerals and turns to stone, it becomes __________
- 5. the process of change that produces new life forms over time
- 8. the law of _________ states that in horizontal sedimentary rock layers, the oldest rock layers are the bottom
- 10. space left behind after a mold fills with sediment
- 11. a hollow imprint of rock left by a dead organism
- 12. an element all living things are made of; can coat an organism to fossilize it
- 13. the study of rocks and minerals
- 15. the exact number of years since the rock formed
- 16. the study of life that existed in prehistoric times
Down
- 1. the remains or other evidence of life from millions of years ago; bones, plants, shells, etc.
- 3. a fossilized impression left by a prehistoric organism
- 4. entire remains of prehistoric organisms saved in ice, tar, or amber
- 6. fossils can only be found in ___________ rock
- 7. fossilized remains that lived during a particular time and can be used to correlate rock layers
- 9. a rock's age compared with the ages of the rocks around it
- 14. breaks in the Earth's crust