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Rocks/Minerals
vocabulary (reassessment)
Term | Definition |
---|---|
mineral | a solid object found in nature that has never been alive |
hardness | the measure of how difficult it is for a mineral to be scratched |
rock | a naturally formed solid made of grains of one or more minerals |
igneous rock | a type of rock that was once melted and then cooled and hardened |
sedimentary rock | a rock made when materials settle into layers and get squeezed until they harden into rock |
metamorphic rock | a rock that has been changed by heat or pressure |
weathering | the breaking down of rocks into smaller pieces |
erosion | the movement of weathered rock and soil |