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KMS8Sci CH 15
The Rock and Fossil Record
| Question | Answer |
|---|---|
| The same geologic processes have been at work throughout Earth's history. | The principle of uniformitarianism |
| THe principle that states that geologice change is sudden | Catastrophism |
| The study of past life using fossils. | Paleontology |
| Sciencetist who study past life using fossils. | Paleontologists |
| Remains of organisms preserved by geologic processes | Fossils |
| The study of the history of the Earth | Geology |
| Most fossils are preserved in | Sedimentary Rock |
| A missing layer of rock in a sequencing parallel rock layer | Disconformity |
| The idea that younger rocks lie on top of older rocks. | Superposition |
| A break in the geologic record. | Uncomformity |
| The process of figuring out if an object is older or younger than another. | Relative Dating |
| The process of wearing down. | Erosion |
| A missing layer that exitsts between horizontal and folded rock layers. | Angular Unconformity |
| A break in the Earth's crust. | Fault |
| Process in which minerals replace tissues. | Mineral Replacement |
| Unstable isotopes | Radioactive |
| The process of figuring out how old an object is | Absolute dating |
| The most common method of absolute dating | Radiometric Dating |
| The time it takes for one-half of a radioactive sample to decay | Half-life |
| The process in which radioactive isotopes break down into stable isotopes | Radioactive Decay |
| Mark or Cavity | Mold |
| Fossil from a specific time period | Index Fossil |
| Fossil formed by an animal's movement | Trace Fossil |
| mold filled with sediment | Cast |
| What is hardened tree sap? | Amber |
| Largest division of geologic time. | Eon |
| Unit of geologic time that includes two or more periods | Era |
| Third largest division of geologic time | Period |
| Fourth largest division of geologic time | Epoch |
| Death of a species | Extinction |
| Standard method that divides Earth's history into parts | Geologic Time Scale |
| A mark left by a dinosaur's tail would be considered a | Trace Fossil |
| How many years of Earth's history do geologists study? | 4.6 Billion Years |
| To reconstruct Earth's climate history, Scientists drill out? | Ice Cores |
Created by:
stameykl
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