Yellowstone

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Across
  1. 4. Energy source from planet's internal heat
  2. 5. Large, shaggy-coated hoofed mammal
  3. 7. Crater that forms when a volcano collapses
  4. 8. Large mammals belonging to the dog family
  5. 10. Eighteenth president of the U.S.
  6. 11. One of the largest species of the deer family
Down
  1. 1. The first national park
  2. 2. Hot spring that periodically erupts
  3. 3. North American subspecies of brown bear
  4. 6. French term for "pierced nose"
  5. 8. Forty-fourth state
  6. 9. Largest tributary of the Columbia River