physical science

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Across
  1. 4. the top or extreme point of something?
  2. 5. effect when a sound is coming toward you is called what?
  3. 7. relating to lines that bisect the globe through the poles pitch?
  4. 8. when two objects rub together it called what?
  5. 9. is a way of thinking or coming to mutual understanding?
  6. 10. the high or low quality of a sound?
  7. 11. The type of electromagnetic is called what?
  8. 13. is bend around through
  9. 14. and current what are the two types of electricity?
  10. 15. is a forceful exertion?
Down
  1. 1. when the object producing that sound is moving it's called what?
  2. 2. is when an object bounce off an object is called what?
  3. 3. mechanical vibrations transmitted by an elastic medium?
  4. 6. is a slow and bend is what
  5. 12. having or employing wavelengths longer than light but shorter than radio waves?