Out in the field-Crossword puzzle

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Across
  1. 5. The study of prehistoric people and their culture
  2. 6. The study of sound and sound waves
  3. 8. The study of composition and properties of substances
  4. 10. The study of the relations and interactions
  5. 11. The study of the ocean
  6. 15. The study of branches dealing with dynamics
  7. 16. The study of soil management, and the production of field crops
Down
  1. 1. The study of branches dealing with plant life
  2. 2. The study of life existing geologic periods
  3. 3. The study of branches dealing with fish
  4. 4. The study of origin, nature, and coarse of diseases
  5. 7. The study of matter, energy, motion, and force
  6. 9. The study of science dealing with the atmosphere
  7. 12. The study of the material universe
  8. 13. The study of animals
  9. 14. The study of living and living matter