Crossword puzzle

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Across
  1. 3. how fast and object is moving
  2. 4. the study of earths landforms
  3. 6. amount of gravitational force affecting an object
  4. 8. the study of the physical nature of stars and other bodies in space
  5. 11. the theory that earths features are the results of catastrophes
  6. 13. of closeness to the desired value
  7. 14. the theory that the continents are subtly drifting farther from each other as a result of tectonic activity
  8. 15. the study of the physics of earth and space
Down
  1. 1. the shifting of earths layers sometimes causing earthquakes
  2. 2. the theory that the earths landforms were made through slow processes that are still observable today
  3. 5. ability to reproduce the same result every time
  4. 7. the study of space
  5. 9. the study of fossils
  6. 10. notation-expresses numbers in a convenient decimal form
  7. 12. analysis- relationship between two physical quantities based on their base quantities