| A | B |
|---|
| conductor | material that does allow electrons to move easily |
| insulator | material that does not allow electrons to move easily |
| magma | molten rock |
| basin | low area on earth that contains an ocean |
| aquifer | layer of permeable rock that allows water to move freely |
| cast | fossil formed when sediments fill a mold and harden into rock |
| circuit | closed path through which an electric current can flow |
| constant | variable that stays the same in an experiment |
| climate | pattern of weather that occurs in a particular area over many years |
| control | standard used for comparison in an experiment |
| crater | steep walled depression around a volcano's vent |
| crest | highest point of a wave |
| effort force | force applied to a machine |
| epoch | division of geologic time smaller than a period |
| embryology | study of development in organisms |
| evolution | changes in the inherited features of a species over time |
| fault | surface along which rocks break and move |
| impermeable | material through which water cannot pass |
| ore | mineral resource that can be mined at a profit |
| trough | lowest point of a wave |
