| A | B |
|---|
| Charles Darwin | Scientist who observed finches and developed the idea of Natural Selection |
| Natural Selection | Theory that states the organisms most adapted to an environment will survive changes to the environment. |
| Finches | Birds that Darwin studied; Had different beaks for different foods |
| Adaptation | Any behavior, body part, trait that helps make life better or easier |
| 4.6 billion years old | Earth's age |
| Offspring | Children |
| Traits | Characteristics passed on from parent to offspring |
| Organisms have changed | From simple to very complex in Earth's history |
| Extinction | Happens when organisms can not adapt to their environment |
| To adapt | Means to change |
| Examples of adaptations | Thumbs, webbed feet, camouflage |
| Variation | Differences in organisms |
| Organism | A single individual |
| Environment | Where an organism lives |
