| A | B |
| fluorescent | are materials that when light shines on them they glow |
| Marie Curie | called or named radioactive decay "radioactivity" |
| Alpha Particles | can cause the most damage from inside a living thing |
| Carbon -14 | used to date materials and determine how old they are. When something dies its level of Carbon-14 drops |
| half-life | the time it takes one-half of the nuclei of a radioactive isotope to decay |
| fission | can be made to happen when atoms are hit with neutrons |
| nuclear chain reaction | continuous series of nuclear fission reactions. Example nuclear power plant |
| nuclear power plants | Advantage: cost less to run Disadvantage: cost more to build |
| the sun | high temperatures needed for fusion are found here |
| hydrogen isotopes | found in the Earth's waters, they could make fuel for fusion for millions of years |