1. __________________Heat travels in the form of waves that are given off by hot
objects.
2. __________________ Used to stop or lessen wasted energy
3. __________________Astronomer who invented the Celsius Temperature
4. __________________measure of average kinetic energy of the particles in a
substance
5. __________________ these are trap heat gases on Earth
6. __________________ materials through which heat can be easily transferred
7. __________________ as early as 600 BC, when rubbed vigorously with a piece of
cloth can attract objects
8.___________________ the physician who called substances that are rubbed against
other substances as electrics
9. __________________ He introduced the term positive charge and negative charge
10. ________________ located inside the nucleus which has a positive charge
11. ________________ which is the modern theory of electric charges explains
existence of charges in an atom
12. ________________ is an intermediate material between a conductor and an
insulator
13. ________________ process of charging by contact
14. ________________ a device for determining the kind of charge a body has
15. ________________ this must be given an initial charge before it can be used

16. ________________ object that serves as a seemingly infinite reservoir of electrons
17. _________________ meaning of electricity from the greek word electron
18. _________________ offers practically no resistance to the flow of charges below
certain temperatures
19. ________________ He discovered superconductivity in 1911
20. ________________believed to carry fractional charges of e.