River Valley Civilizations

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Across
  1. 2. A way of supplying water to an area of land.
  2. 3. A collection of rich soil and tiny rocks, usually carried by running water or floods.
  3. 4. A group of rivers that exit into an ocean or lake.
  4. 5. When there are more products than there are demands, a surplus, or excess, of products exists.
  5. 6. When each worker specializes in a specific task or job.
  6. 7. Human-made waterways built for the purposes of irrigation.
Down
  1. 1. Located in the Middle East, a large arc of rich, or fertile, farmland.