| A | B |
| extinct | when all animals or plants have died |
| paleontologist | a scientist who studies fossils |
| fossil | preserved remain of a plant or animal |
| erode | to wear away |
| erosion | wearing away of soil by wind and water |
| dinosaur | reptile which lived millions of years ago |
| endangered | animals/plants in danger of becoming extinct |
| habitat | place where animal lives |
| property | characteristic which belongs to something |
| matter | anything that has mass and takes up space |