Roots Review Puzzle

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Across
  1. 2. - A work or theory dealing systematically with the structure and behavior of the physical and natural world
  2. 4. - To stretch or prolong in space or time
  3. 8. - Relating to two or consisting of two parts or elements
  4. 9. - A complete and closed path followed by an electric current
  5. 10. - Lasting for only a limited period of time
  6. 12. - Examination of a body to determine the cause of death
Down
  1. 1. - A geological formation containing water
  2. 3. - Able to be trusted or believed
  3. 5. - To protect from harm or danger
  4. 6. - A musical group consisting of four singers or musicians
  5. 7. - A period of one hundred years
  6. 11. - A written account of one's own life