| A | B |
| ammeter | measure current |
| ampere | a unit of electrical current |
| atom | smallest particle |
| battery | dc voltage source |
| circuit | complete path for current |
| conductor | very little resistance to current |
| coulomb | 6.26 x 10 to power 18 |
| current | movement or flow of electron |
| electron | negatively charged around the nucleus |
| insulator | material that resistance to current |
| joule | respresents one newton-meter |
| kilo | one thousand |
| matter | mass and occupies space |
| mega | one million |
| micro | one millionth |
| neutrons | neither positive nor negative |
| necleus | center of an atom |