Across
- 1. - The age of the rock
- 4. - any feature that cuts across a sequence of rocks, is younger than everthing it cuts
- 5. - First sine of life on earth
- 6. - an undisturbed sequence of rocks, the oldest rocks are on the bottom and the youngest are on the top
- 10. - How scientists determine the age of a rock
- 11. - the amount of time it takes for half of a remaining isotope to decay
Down
- 1. - Earth has calmed down and has stablized
- 2. - is any rock or fragments thats included inside antohter rock is older than the rock in which is included
- 3. - Dinosaurs, pangea, continetal drift
- 7. - The decay of a specific isotope
- 8. - our solar system still forming
- 9. - 65.5 million years ago to present day