| A | B |
|---|
| Anapsid: skull does not have | an opening behind the eye |
| Ankylosaur: | an armored dinosaur |
| Cambrian Period | about 570 - 510 million years ago |
| Cast Fossil: the shape of a buried | animal preserved in the form of hardened minerals |
| Cenezoic Era is the last 65 million years | or the Age of Mammals |
| Ceratopsan: plant eater with | pointed horns and bony frill |
| Check teeth: used for chewing | behind the front teeth |
| Coprolites: | fossilized animal droppings |
| Cretaceous Period | 144-65 million years ago |
| Cycad: a non-flowering plant | related to today's conifers |
| Dental battery: a large number of | interlocking teeth forming a shearing and grinding surface |
| Devonian Period: | 410-60 million years ago |
| Diapsid: a reptile whose skull has | two openings on either side such as a lizard |
| Fern: nonflowering plant with | finely divided fronds |
| Gastroliths are stones found | in the stomachs of some plant-eaters |
| Ginko: A tree that looks like a conifer | but which sheds its leaves in the fall |
| The maidenhair tree is the | only living species of the gingko tree |
| Gondwanaland was made up of | Africa, Australia, Antarctica, South America and India |
| Hadrosaur: a large plant eating | dinosaur with a long flat bill |
| Horse-tails are plants | related to ferns |
| Ichthyosaur: a dolphin-like reptile | that lived in the ocean |
| Iguanodont: a plant-eating | dinosaur |
| Jurassic Period | 206-144 million years ago |
| Laurasia: northern super-continent | made up of N.A., Europe and Asia |
| Mesozoic Era: | 250-65 million years ago |
| Mold Fossil: Where the remains of an | animal have been dissolved |
| Ordovician Period: | 510-440 million years ago |
| Ornithischia: one of the two orders | of dinosaurs |
| Ornithomimid: is similar | to the present day ostrich |
| Ornithopod: a two footed | plant eater |
| Pachycephalosaur: a two-footed | plant eater with a thick skull |
| Paleontologist: a scientist who studies | fossils and the history of life |
| Paleozoic Era | 600-250 million years ago |
| Pangaea: super-continent of the | Permian Period |
| Plesiosaur: a long-necked reptile | that lived in the ocean |
| Precambrian Period | 3,500 - 570 million years ago |
| Saurischia: one of the two orders | of dinosaurs |
| Sauropod: Bulky, long-necked | long-tailed plant eater |
| Scute: a bony plate set into | the skin of a dinosaur |
| Silurian Period | 440-410 million years ago |
| Stegosaur: plant-eating dinosaur with | rows of bony plates on its back and spikes on its tail |
| Synapsid: a mammal-like reptile | whose skull has one opening on each side |
| Tertiary Period: | 65- 2 million years ago |
| Thecodont: were probably the | ancestors of the dinosaurs |
| Theropod: a two-legged | meat-eating dinosaur |
| Trace fossil: a fossil that is not | part of the actual body of an animal |
| Triassic Period: | 250-206 million years ago |
| Ammonites: | shelled marine animals |
