Solve the puzzle

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Across
  1. 3. a means of getting food
  2. 4. an alloy of copper and tin
  3. 5. a kind of stone that chips easily
  4. 6. huge blocks of stones
  5. 7. used to draw carts
Down
  1. 1. darwin a renowned biologist
  2. 2. small stones
  3. 4. used to make needles blades and other tools