Across
- 6. when soil and rock are broken down from a natural force
- 7. the age of something in comparison to another thing
- 11. the process in which organisms change over time to better fight their habitat
- 14. the change in characteristics of lifeforms over generations
- 15. the change in the earths physical features
- 17. the process of earths surface being worn down
- 18. rocks made of particles of rock
- 20. the chronological dating of geological events
- 21. a scientist who studies fossils
Down
- 1. different parts of the geological time scale
- 2. the theory that the earths crust is separated into parts that are called plate tectonics
- 3. the exact age that something is
- 4. when magma moves down through the cracks in the earths crust
- 5. the difference of dna in organisms
- 8. the theory that organisms change over time
- 9. a period of time that is separated into periods
- 10. the rule that states that the top layer of rock is the youngest and the bottom layer is the oldest
- 12. rocks made from the cooling of lava
- 13. remains or imprints of plants or animals who lived in the past
- 16. fossils used to date things from the past
- 19. when magma moves from the inside to the outside of the earths crust