Noun phrases for inventions

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Across
  1. 2. How people live today with technology and cities.
  2. 4. How clever and creative humans are.
  3. 5. Simple math like adding, subtracting, multiplying, and dividing.
Down
  1. 1. A tool that helps you find north.
  2. 3. People who live far away and have different ways of life.