ROUND 1

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Across
  1. 3. Reduce friction in machines.
  2. 6. Simple machine for lifting or moving.
  3. 8. Study of heat and energy.
Down
  1. 1. Tightens or loosens nuts and bolts.
  2. 2. Transmits power in machines.
  3. 4. Material's internal resistance to deformation.
  4. 5. Rotational force.
  5. 7. Resistance when surfaces contact.