| A | B |
|---|
| igneous rock | made from melted rock |
| unstratified | no layers or stripes |
| sedimentary rock | made by weathering, erosion, deposition, compaction and cementation |
| weathering | breaking down of rocks and other materials on the earth's surface |
| erosion | Broken down rocks and soil are moved from one place to another. |
| deposition | Sediments are laid down in new places. |
| cooling, crystallization | Lava (melted rock) turns into solid. |
| heating | make the temperature go up. |
| compaction, pressure | Process by which layers of sediments are pressed together to form sedimentary rocks |
| cementation | process by which sediments are glued together by minerals in water to form sedimentary rocks |
| intrusive rock | formed when magma (melted rock) cools slowly inside the earth; has large crystals. eg. granite, gabbro |
| extrusive rock | formed when lava (melted rock) cools slowly; has small crystals. eg. basalt, obsidian, pumice. |
| foliated | These rocks have layers (bands) of minerals. |
| unfoliated | You can't see layers (bands) of minerals in these rocks. |
| igneous | Granite, basalt, obsidian and pumice are what type of rocks? |
| metamorphic | Slate, gneiss and marble are what type of rocks? |
| metamorphic rock | made from heat and pressure |
| stratified | striped layers; put in layers |
| sedimentary | Conglomerate, sandstone, shale and limestone are what type of rocks? |
