Across
- 3. Any method of determining whether and object or event is older or younger than other events
- 6. Ordered arrangement of rock layers that is based on the relative ages of the rocks and in which the oldest rocks are at the bottom
- 7. Fossil common to a period that is used to relatively date material
- 8. A principle that states the younger rocks lie above older rocks if have not been disturbed
- 10. Method to determine the absolute age of an object by comparing relative percentages of radioactive isotopes to stable isotopes
- 11. Break in a body of rock along which one block moves relative to another
Down
- 1. Bending, tilting, and breaking of Earth’s crust; change in the shape of rock in response to stress
- 2. Standard method used to divide Earth’s long natural history
- 4. the formation of igneous rock; rock formed from magma that disrupts the superposition of rock layers
- 5. Any method of measuring the age of an event in years, more accurate
- 9. Trace remains (turned into rocks and minerals) of an organism that lived long ago, most commonly preserved in sedimentary rock.