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Unit 2 lesson 6+7
Vocabulary
| Term | Definition |
|---|---|
| volcano | any place where gas,ash,or melted rock come out of gthe ground. |
| magma | melted rock |
| lava | magma that has reached Earth's surface |
| vent | opening of a volcano |
| techtonic plates | giant sections of lithosphere on Earth's surface |
| hot spot | a location where a column of extremely mantle rock (mantle plume) risks through the athenosphere |
| uniformitarianism | principle that states that geologic processes that happened in the past can be explained by current geologic processes |
| fossils | the trace or remains of an organism that lived long ago; most commonly preserved in sedimentary rock. |
| trace fossil | a fossilized structure that formed in sedimentary rock by animal activity on or in soft sediment |
| climate | describes the weather conditions in the area over a long period of time |
| ice core | a long cylinder of ice |