| A | B |
|---|
| classification | grouping together |
| igneous rocks | rocks formed from the cooling of hot, melted materials |
| sedimentary rocks | rocks are formed by the cementing of materials together |
| metamorphic rocks | rocks formed when other rocks are put under great heat and pressure |
| molten | melted |
| magma | melted rocks and minerals inside the earth |
| lava | magma that comes through the earth's surface |
| texture | the size of the crystals in a rock |
| sediment | solid materials that settle to the bottom of a lake or ocean |
| particle | a small piece of a solid material |
| limestone | a sedimentary rock made of calcite |
| coquina | sedimentary rocks formed from the shells that are cemented together |
| conglomerate | sedimentary rock made of pebbles and gravel |
| sandstone | sedimentary rocks made of sand |
| shale | sedimentary rock made of mud and clay |
| metamorphic | rocks formed by changes in other rocks |
| pressure | a pressing force |
| gneiss | a metamorphic rock with bands of minerals |
| schist | a metamorphic rock showing minerals flattened into bands and layers |
| slate | a metamorphic rock made from shale and that breaks in flat sheets |
