Across
- 6. the trace remains of an organism that lived long ago; preserved in sedimentary rock
- 8. states that younger rocks lie above older rocks if the layers have not been disturbed
- 10. bending of rock layers that can happen when rock layers are squeezed together
Down
- 1. igneous rock that forms when magma is injected into existing rock and then cools
- 2. when Earth's forces move rock layers up or down unevenly
- 3. fossilized structures that formed in sedimentary rock by animal activity (tracks/burrows)
- 4. used to determine the ACTUAL age of an event or object in years.
- 5. all the fossils discovered so far on Earth
- 7. determines whether an object/event is older or younger than other objects or events
- 9. break or crack in Earth's crust