Energy for Edling

1. to return light, heat, or sound from a flat and shiny surface
3. a circular journey beginning and ending at the same place
9. an electrically charged atom that is formed from the loss or gain of one or more electrons
12. to allow light to pass through but not allowing clear visibility on the opposite side
13. a unit used to express the intensity of a sound wave
14. anything that has mass and takes up space
15. a measure of warmth or coldness of an object
16. does not allow light to pass through
17. the ability to do work
18. a particle that has no charge
19. the smallest part of an element

1. the change of direction of a ray of light, sound, or heat in passing from one object to another
2. an electron that is not attached to an atom and is free to move outside of atoms
4. a material that does not allow the flow of electricity through it
5. to allow light to pass through so that you can clearly see through the opposite side
6. a positively charged particle
7. a unit of electrical charge that is negative
8. a substance that conducts heat or electricity
10. the science dealing with electrical charges and currents
11. something that flows