Word puzzle

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Across
  1. 1. the study of origin of univers
  2. 5. biology study of life in other planets too.
  3. 6. The study of genetics.
  4. 7. The study of mountain,hills
Down
  1. 1. study of weather
  2. 2. the study of human behaviour nature
  3. 3. the study of human body parts
  4. 4. The study of moon.