Crossword Puzzle

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Across
  1. 2. Wandering people
  2. 5. Group of seven stars.
  3. 7. It is a unique planet, 4.5 billion years old.
  4. 8. New metal made by mixing two metals.
  5. 9. ___________ was the first metal to be discovered.
Down
  1. 1. Early man used, made of stone.
  2. 3. The biggest discovery of New stone age
  3. 4. It was used to scare away wild animals.
  4. 6. During ________period man lived like a nomad.