Nora's crossword puzzle

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Across
  1. 4. they spent most of their time looking for food
  2. 9. stonehenge is north of
  3. 12. the use of new ideas and tools to survive
  4. 13. a continent with hunter gatherers
  5. 14. last ice age ends
  6. 15. sharp knives and ax heads from....
Down
  1. 1. they used this for communication
  2. 2. the early part of human history, also known as the old stone age
  3. 3. light at night, provided warmth
  4. 5. early period of human history
  5. 6. they hunted large animals
  6. 7. long periods of extreme cold on earth
  7. 8. what is southeast of Neanderthal
  8. 10. they lived in caves to protect them from the cold.
  9. 11. a traveling person without a home