| A | B |
|---|
| fossil | a dead animal or plant buried and becomes hard like a rock |
| extinct | no longer in existence, not living |
| catastrophe | a great disaster |
| species | groups of living things |
| impact | a hard hit |
| exploitation | using too much of something, usually in a greedy way |
| organism | living things |
| appalling | shocking, very upsetting |
| ceases | stops an action |
| brink | the top edge of a steep incline |
| skeleton | a body's bones |
| auction | a sale in which items are sold to the person who offers the most money |
| triggered | caused |
| comet | an object made of dust, gas, or ice that travels in outer space |
| asteroid | a large rock in outer space |
| convert | change |
| died off | died one after another |
| mass extinction | the death of all animals or plants in many species |
| remains | parts or things that are left |
| climate | the type of weather that a place has |
| ice ages | periods of time when Earth was very cold and much of Earth's water turned to ice |
| identified | named |
| progressing | advancing, moving forward |
| expect | think something will happen |
| track | follow the movement of something |
| keep close tabs on | notice what something is doing |
| greater | larger |
| alarming | shocking, scary |
| estimate | make a judgment about |
| devise | create, invent, think of |
| elaborate | coupled; detailed |
| neglect | a state of not giving enough attention to something |
| wholesale destruction | very bad damage that affects many things |
| individual | one of a group |
| descendants | people or animals born into a certain family or group |
| absent | not present; missing |
| oblivion | nothingness |
| teetering | rocking back and forth in a dangerous way |
| displaced | removed |
| convert | change |
| eliminated | removed or gotten rid of |
| non-native | from somewhere else |
| glamorous | seen as interesting and exciting |
| fungi | livings things that dead plants or animals and cannot survive apart from them |
