SCIENCE REVIEW

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Across
  1. 6. A wave that does NOT require a medium
  2. 8. A part of the electromagnetic spectrum that has the lowest frequency
  3. 10. A part of the electromagnetic spectrum that has the highest frequency
  4. 11. Located in an atom and has a positive charge
Down
  1. 1. Has a density of one
  2. 2. A wave that requires a medium
  3. 3. The horizontal rows of elements in the periodic table
  4. 4. A disturbance that transfers Energy through matter or empty space
  5. 5. The verticle columns of elements on the periodic table.
  6. 7. Located in an atom and has a neutral charge
  7. 9. Located in an atom and has a negative charge