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6 Paleontology vocab
34 vocab. for paleontology for 6th grade level.
| Term | Definition |
|---|---|
| Big disaster over a large mass of land. | Catastrophe |
| Figuring out whether a rock layer is older or younger than the layers around it. | Relative Age (dating) |
| Law that states sediments are deposited in horizontal layers. | Law of Original Horizontality |
| An imprint left in sediment where a plant or animal was buried. | Mold |
| The largest divisions of geologic time. | Eon |
| The theory that the Earth's features usually form because of small changes that happen. | Uniformitarianism |
| The theory that the Earth changes only because of sudden events (catastrophies). | Catastrophism |
| The study of ancient/past life and fossils. | Paleontology |
| A scientist who studies fossils. | Paleontologist |
| Idea that younger rocks lie above older rocks. | Law of Superposition |
| A detailed series of rock layers. | Geologic Column |
| A break in Earth's crust. | Fault |
| When magma moves into cracks in rock layers, then hardens. | Intrusion |
| When rock layers are bent because of pressure inside Earth. | Folding |
| When forces from inside Earth move rock layers so that they are slanted. | Tilting |
| A break in, or a missing part of a rock layer. | Unconformity |
| Finding the exact age of a rock. | Absolute Age (dating) |
| When a radioactive isotope breaks down into a new isotope. | Radioactive Decay |
| The preserved remains of an organism. | Fossil |
| Hardened tree sap. | Amber |
| Minerals replace all or part of an organism's tissues. | Petrification |
| Signs showing an organism was alive, there, or their activity. | Trace Fossil |
| A fossil that forms when sediment fills a mold. | Cast |
| Fossil of an organism that lived during a short period of time and was widely distributed. | Index Fossil |
| Combined information from rocks and fossils to create a time line of Earth's history. | Geologic Time Scale |
| Second largest division of geologic time. | Era |
| Third largest division of geologic time. | Period |
| Fourth largest division of geologic time. | Epoch |
| The death of every member of a species. | Extinction |
| When lava flows onto Earth's surface, and hardens. | Extrusion |
| When organisms evolve. (grow and change). | Evolution |
| Number of species decrease dramatically over a short period of time. | Mass Extinction |
| Explanation of something that is repeatedly tested and confirmed through observations and experiments. | Scientific Theoory |
| The study of the origin, history, and structure of Earth. | Geology |
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