| A | B |
|---|
| biodivesity | the study of all aspects of the diversity of life on earth |
| Five types of extinctions | single species, ecosystem, systematic, unknown, and natural |
| Single species extinction | single species, like the Carolina parakeet |
| Ecosystem extinction | many species in the ecosystem go extinct, like the Great Plains |
| Systematic extinction | historically related species, like frogs or the dinosaurs |
| Unknown extinctions | things that go extinct and we don't even know about them and we probably won't ever |
| Natural extinction | extinctions that happened before humans could have caused them, anything naturally going extinct: we didn't do it! |
