Green

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Across
  1. 2. highly or abnormally alert to potential danger or threat
  2. 5. an electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation
  3. 6. a very large, heavily populated city or urban complex.
  4. 8. abnormally or extremely active.
  5. 9. a benevolent fictional character with superhuman powers
  6. 10. an expressway.
Down
  1. 1. a unit of information equal to 220 bytes or, loosely, one million bytes.
  2. 3. a person who has a particular regard for someone or something.
  3. 4. a person who concentrates primarily on a particular subject or activity
  4. 7. a person who has a particular regard for someone or something.