| A | B |
|---|
| fossil record | the record of preserved evidence of a single species |
| relative dating | a method of determining the age of a fossil by its position in layers of rock |
| absolute dating | the process of determining an age on a specified time scale in archaeology and geology |
| Geologic Time Scale | The period of time covering the physical formation and development of Earth |
| Eras | long periods of time |
| evolution | change over time |
| overproduction | a species producing more than can survive |
| competition | struggle between living things for resources |
| adaptation | gradual change that allows species to survive in their environment |
| natural selection | individuals best adapted are more likely to survive and reproduce |
