"Find"Ologies see what I did there?

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Across
  1. 5. Study of geology of celestial bodies
  2. 7. The study of living things and everything about it.
  3. 9. Structure and function of living things.
  4. 10. The study of the moon, stars, and other objects in space.
  5. 11. The study of life in outer space
  6. 13. The study of cats
  7. 14. The study of the stomach and intestines
  8. 16. The study of the heart
Down
  1. 1. Study of chemistry in living things which included metabolism.
  2. 2. study of the biosphere and its relations to the lithosphere and atmosphere
  3. 3. The study of bacteria especially in relation to medicine and agriculture.
  4. 4. The study of the fetus Sometimes spelled foetology
  5. 6. The study of ants
  6. 8. Study of ticks, mites and spiders
  7. 12. The study of Earth’s age
  8. 15. The study of gemstones