| A | B |
|---|
| Mica | a common mineral that forms rock |
| Minerals | different kinds of crystals that make up rock |
| Rocks | made up of one or more minerals |
| a very soft mineral | talc |
| a mineral that has the hardness of 7 on the Mohs scale | quartz |
| Weathering | a natural process that breaks rocks into smaller pieces |
| Soil make-up | small bits of rock, plant & animal remains, live animals |
| Sedimentary rock | forms in layers |
| Bones & leaves | form fossils |
| Obsidian | an example of igneous rock that cooled very quickly |
| When sedimentary rocks melt | igneous rock forms |
| Metamorphic rock | Rocks that change from one kind to another |
| High heat & pressure | cause igneous rocks to form |
| Fossils not found in igneous rock because | heat of the molten rock would destroy plant & animal remains |
| On the Mohs Scale, the higher the rating | the harder the mineral |
| Emerald(7.5) Saffire(9) | Emerald is the softer mineral |
| Magma that slowly cools below the surface | forms igneous rock with larger crystals |
| Magma that reaches the surface and cools quickly | forms igneous rock with smaller crystals |
| Properties used to identify minerals | color, hardness, streak, luster |
| Rock cycle | on-going process in which old rock is broken down & forms new rock over millions of years |
| Fossils are found in | Sedimentary rock |
| Pyrite color/luster | gold/metallic |
| Which is harder? mica or diamond | diamond |
| Which has a 2.5 Mohs rating? mica/diamond | mica |
| Examples of igneous rock | pumice, obsidian, basalt |
| Examples of sedimentary rock | limestone, sanstone, shale |
| Examples of metamorphic rock | gneiss, slate, marble |
