| A | B |
|---|
| Earth's crust is composed of | minerals - silicon & oxygen |
| Minerals | occur naturally & are ALWAYS a SOLID |
| Characteristic of all minerals | orderly crystal shape & chemical composition |
| Obsidian | forms naturally as cooling lava BUT does not allow crystals to form SO it CANNOT be classified as a mineral |
| Color, Streak, Luster, Density, Cleavage/Fracture, Hardness | Properties used to ID minerals |
| Subsidence | is the sinking of Earth's crust |
| rift zones | oceanic plates moving away from each other |
| erosion | transporting rock |
| weathering | scraping or breaking apart of rock |
| acid rain | example of greater weathering over just everyday rain |
| igneous to sedimentary | breaks into sediments - weathering, erosion, compaction & cementation occur |
| metamorphic to igneous | melting into magma & cooling |
| igneous to metamorphic | heat & pressure break down rock |
| Thinnest compositional layer | the crust |
| thickest compositional layer | the core |
| Tectonics plates are located | above the asthenosphere |
| Inner & Outer Core | composed of iron & nickel |
| Inner core & outer core are the physical layers | made up of the compositional layer - the core |
| the upper mantle and the core make up this | the lithosphere |
| mesosphere is the | lower mantle |
