Frozen Earth!

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Across
  1. 3. this animal body part could be sewn into clothing
  2. 6. a frozen layer of soil beneath the surface of the groun
  3. 7. a scientist who studies ancient plants and animals
  4. 10. parts of animals used by early humans were the ____, meat, skin, and bones
  5. 11. ancient artists sometimes painted on the walls of ____
  6. 12. As ocean water levels dropped, a dry land ____ appeared between Russia and Alaska
Down
  1. 1. a scientist who studies the earth
  2. 2. parts of animals used by early humans were the antlers, meat, skin, and ____
  3. 4. one of the most important inventions in human history
  4. 5. a prehistoric mammal
  5. 8. a cold, treeless land area
  6. 9. a huge sheet of ice