wave 1

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Across
  1. 3. It is a toy; a precompressed helical spring
  2. 4. a disturbance or variation which travels through a medium
  3. 5. not rough
  4. 8. vibrating lengthways
  5. 9. a strong, thick line or cord
Down
  1. 1. through which the wave travels
  2. 2. it is vibrating at right angles to the spring
  3. 6. Back and forth
  4. 7. a change of position that does not entail a change of location;