Science stuff.....

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Across
  1. 2. when a force is applied to an object
  2. 7. Energy transfer with touch
  3. 8. The ability to do work
  4. 9. a group of interacting or interrelated elements that act according to a set of rules to form a unified whole.
  5. 10. a state of matter that retains its shape and density when not confined.
  6. 11. a minute quantity or fragment
  7. 12. a state of matter that has no fixed shape and no fixed volume
  8. 13. energy in a substance due to the motion of particles
  9. 17. energy of movement
  10. 18. the transfer of energy in waves
Down
  1. 1. energy transfer between liquid/gases
  2. 3. when one thing goes into another
  3. 4. Stored energy
  4. 5. the measure of the average kinetic energy of the particles in a system
  5. 6. mass of a unit volume of a material substance.
  6. 14. the transfer between thermal energy
  7. 15. a physical substance
  8. 16. a substance that flows freely.
  9. 19. A material that does not let heat or electricity through it