PHYSICS CROSSWORD PUZZLE

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Across
  1. 3. The force exerted on a body by gravity.
  2. 6. The transfer of thermal energy.
  3. 8. An elementary particle that is identical to the nucleus of the hydrogen atom
  4. 11. Movement back and forth at a regular speed.
  5. 12. A type of circuit where the current that flows through all the devices is the same
  6. 13. The set of physical phenomena associated with the presence and motion of electric charge.
  7. 16. The bending of a wave when it enters a medium where its speed is different.
  8. 17. The science of the origin and development of the universe.
  9. 18. The emission of energy as electromagnetic waves.
  10. 19. Effect observed when the source of a wave moves relative to an observer.
Down
  1. 1. A closed loop that allows current to flow.
  2. 2. A reaction in which the products themselves spread the reaction.
  3. 4. A subatomic particle having the same mass as a given particle but opposite electric or magnetic properties.
  4. 5. A hypothetical tunnel connecting two separate points in space-time.
  5. 6. Scientist known for his discovery of the expansion of the universe.
  6. 7. The basic unit of a chemical element.
  7. 9. A device that emits light through a process of optical amplification.
  8. 10. A type of energy possessed by the body due to its motion
  9. 14. Atoms of the same element with different numbers of neutrons.
  10. 15. A type of matter hypothesized to account for a large part of the total mass in the universe.