Across
- 5. “In an undisturbed sequence of rocks, the oldest rocks are on the bottom and the youngest rocks are on top.”
- 6. “Any feature that cuts across a sequence of rocks, is younger than everything it cuts.”
- 7. knowing the exact age of a rock
Down
- 1. “Any rock or fragment that’s included inside of another rock is older than the rock in which it is included.”
- 2. The amount of time it takes for half of a remaining isotope to decay to a daughter product.
- 3. The relative age of a rock is how old it is compared to another rock
- 4. The remains or traces of a now extinct animal or plant