Earth History Vocab. Word Scramble
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| Word | Definition |
| Uniformitarianism | The idea that the same geologic processes that shape Earth today have been at work during all of Earth's history. |
| Catastrophism | The idea that geologic change happens suddenly. |
| Paleontology | The science that deals with the study of past life. |
| Relative Dating | Determining whether an object or event is older or younger than other objects or events. |
| Geologic Record | A geologic history of the Earth. |
| Igneous Rock | Rock that forms when magma cools. |
| Metamorphic Rock | Rock that forms when any type of solid rock changes into another type of rock because of temperature or pressure changes. |
| Sedimentary Rock | Type of rock that forms from fragments of other types of rocks. |
| Superposition | The principle that younger rocks lie above older rocks in undisturbed sequences. |
| Unconformity | A surface that represents a break in or a missing part of the geologic record. |
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