Science

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. The difference in electrical charge between two points in a circuit expressed in volts (9)
  2. 4. A material such as glass or porcelain with negligible electrical or thermal conductivity (9)
  3. 7. An increase in rate of change (12)
  4. 12. The simplest structural unit of an element or compound (8)
  5. 13. A proposal intended to explain certain facts or observations (10)
  6. 14. The temporal end (10)
  7. 15. The power to do work or make things move (6)

Down

  1. 1. The phenomenon of a propagating wave being thrown back from a surface (10)
  2. 3. The act of making and recording a measurement (11)
  3. 5. The distance between two points in the same phase in consecutive cycles of a wave (10)
  4. 6. The change in direction of a propagating wave when passing from one medium to another (10)
  5. 8. A substance formed by chemical union of two or more elements or ingredients in definite proportion (8)
  6. 9. Happening or recurring at regular intervals (8)
  7. 10. A simple machine that gives a mechanical advantage when given a fulcrum (5)
  8. 11. How tightly packed the matter in something is (7)
  9. 12. Attraction for iron (9)