Across
- 2. a bend in layers of rock, sometimes caused by plate movement
- 3. states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it
- 6. any method of measuring the age of an event or object in years
- 10. a principle that geologic processes that occurred in the past can be explained by current geologic processes
- 12. volcanic rock that has cooled outside of Earth’s crust
- 13. volcanic rock that has cooled inside of Earth’s crust
Down
- 1. states that any feature that cuts across a rock or body of sediment must be younger than the rock or sediment that it cuts across
- 4. the theory that states that Earth’s surface is changed slowly over time by gradual processes like plate tectonics, weathering, erosion, and deposition
- 5. theory that states the world is shaped by widespread, sudden natural disasters such as floods and volcanic eruptions
- 7. states that pieces of a rock are older than the rock that contains it
- 8. any method of determining whether an event or object is older or younger than other events or objects
- 9. a crack in the Earth’s crust
- 11. a break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time