Across
- 3. rocks that are younger are _____
- 4. what is cutting the rocks will be younger than any of the rocks it is cutting
- 6. rocks that are older are _____
- 7. remains of animals/plants that have hardened over time
- 9. the exact age that something is
- 10. age but not an exact number
Down
- 1. bottom is older, top is younger
- 2. a rock encasing another rock will be younger than which it is encasing
- 5. a fossil that can be helpful in finding the relative age over a wide area of rock
- 8. the time it takes for half an atom to decay