Earth 1
Across
- 1. Plates slide past one another
- 4. The actual age of a geologic material/event
- 5. The process of objectively establishing facts through testing and experimentation.
- 7. The place in of an event in a time sequence without regard to the absolute age in years.
- 10. The geologic field that deals with all aspects of Earth’s structure, composition, physical properties, constituent rocks/minerals, and surficial features
- 11. Plates are created and spread apart
- 12. A hypothesis that has survived repeated challenges and is supported by accumulating favorable evidence
- 15. The theory that the Earth’s crust is several moving plates that are formed by volcanic activity at the oceanic ridges and destroyed along great ocean trenches.
- 17. The field that uses geologic principles and methods to reconstruct the geological History of Earth
Down
- 2. The zone between 50 & 250 kilometers below the Earths Surface
- 3. A testable and falsifiable guess based of data/facts
- 5. A theory that have been repeatedly tested and proven, and can be expressed mathematically
- 6. The outer layer of the Earth comprising of the crust and upper mantle
- 8. Plates are Destroyed
- 9. The second layer of the density/chemical layers of the earth
- 13. The outer layer of the lithosphere averaging a thickness of 32 kilometers
- 14. The time in which a radioactive “parent” decays half of its radioactive atoms into a daughter product
- 16. Process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genetic constitution