Across
- 5. Name of the surface location directly above where an earthquake occurs.
- 8. Reference point for longitude.
- 10. The name of the theory responsible for the initial formation of the Universe.
- 11. Another name for a test in an experiment.
- 13. Location where the first motion of an earthquake occurs.
- 15. P waves and S waves are two types of _____ waves.
- 16. Dating method that defines the order that events occur.
- 18. Refers to an inherited trait that increases an organism’s chance of survival.
- 19. Location of the largest earthquake of all time.
- 20. Light-colored igneous rock generally has a ____ composition.
- 21. Name of the first condensed form of matter.
Down
- 1. Person who presented the theory of Natural Selection.
- 2. The name of the eon that we presently live.
- 3. The ancient landform where all of the continents were connected.
- 4. Another name for the experimental group.
- 6. North, south, east, and west are called _________.
- 7. The major evidence that supports plate tectonics.
- 9. Geologic principle that states that older events are found on the bottom.
- 12. The _________ group contains the independent variable.
- 14. Principle that shows gaps of time in the rock record.
- 17. Location of the largest earthquake in U.S. history.