| A | B |
|---|
| Basalt - Igneous |  |
Granite,  | Gneiss (metamorphic) comes from this igneous rock |
Marble - Metamorphic,  | Limestone can turn into this metamorphic rock |
Pumice - Igneous,  | Formed from lava that cooled with hot gases trapped inside, causing it to be filled with air holes. |
Sandstone - Sedimentary,  | Layers and layers of sand are deposited onthe sea bottom to form this rock |
Conglomerate,  | Sedimentary rock formed from a mixture of sand and pebbles |
| Magma | melted rock below the Earth's surface |
| Shale, a sedimentary rock, becomes this metamorhphic rock | slate,  |
| A rock used for fuel - made from living plants covered with sediment | Coal,  |
| Igneous rocks | Rocks formed from hardened lava that flowed from volcanoes |
| Sedimentary rocks | Formed by erosion and weathering |
| Metamorphic rocks | Rocks changed by high temperature and high pressure |
| Sedimentary, Igneous, Metamorphic | The 3 big rock groups |
| Fossils | remains of once living organisms often found in sedimentary rocks |
| limestone, sandstone, shale, conglomerate | 4 sedimentary rocks |
| pumice, granite, obsidian, basalt | 4 igneous rocks |
| gneiss, slate, marble | 3 metamorphic rocks |
| Shale | The most common type of sedimentary rock, formed from layers of mud |
| Limestone | small sea animals and shells are pressed into this kind of rock |
| Anthracite | a kind of metamorphic rock, commonly known as "coal" |
