Forms of Energy

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Across
  1. 1. A force that opposes motion between two surfaces that are in contact
  2. 4. mechanical energy that travels as waves through the air or water and vibrates the ear drum upon contact
  3. 6. Energy that causes a change in temperature of materials
  4. 8. A force that pulls objects toward each other
  5. 9. material that allows heat or electrical energy to easily flow through it
Down
  1. 2. material through which heat or electricity does not easily flow
  2. 3. energy that can be sensed by the eye
  3. 5. of motion
  4. 7. to pull toward