The OLOGY's

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Across
  1. 3. Study of the heart
  2. 5. Study of the skin
  3. 8. Something that you probably use daily
  4. 10. study of animals
  5. 11. The study of space
  6. 12. System of ideas
  7. 13. The study of life
Down
  1. 1. Study of social interaction
  2. 2. Study of beauty
  3. 4. Study of the Earth
  4. 6. Study of oceans
  5. 7. Study of the environment
  6. 9. Study of human history