| A | B |
|---|
| mineral | the building blocks of rocks |
| igneous | type of rock made from magma or lava |
| sedimentary | type of rock made from fragments of rock or organic material |
| metamorphic | type of rock formed from other rocks by intense heat and/or pressure |
| how rocks are classified | by how they are formed |
| large crystals | formed by magma that cools slowly |
| small crystals | formed by lava that cools quickly |
| fossils | may be found in sedimentary rock |
| granite | igneous rock with intergrown crystals |
| basalt | dull, dark igneous rock formed from lava |
| obsidian | volcanic glass |
| pumice | igneous rock that floats on water |
| conglomerate | sedimentary rock made of rounded pebbles cemented together |
| coal | secimentary rock formed from remains of plants |
| limestone | sedimentary rock formed from calcite |
| foliated | metamorphic rock with grains arranged in flat layers |
| rock cycle | any type of rock can become any other type of rock |
| sediments | particles of rock or organic material |
| luster | may be metallic or non-metallic |
| marble | metamorphic rock that forms from limestone |
