| A | B |
|---|
| Made of minerals | rocks |
| Form when hot, melted rock material cools and hardens | igneous rocks |
| Molten rock material that forms deep within the Earth | magma |
| Magma that reaches the Earth's surface | lava |
| An igneous rock, called natural glass, which is black and glassy | obsidian |
| Rocks that form at Earth's surface when sediments harden into rock | sedimentary rocks |
| Bits of existing rocks, minerals, and organic materials | sediments |
| The binding of sediments | cementation |
| Forms when shells of dead sea animals become cemented together | limestone |
| Any remains or evidence of an organism from the past | fossil |
| New rocks that form when existing rocks are changed by heat, pressure or chemicals | metamorphic rocks |
| Forms when shale is exposed to changes in temperature and pressure | slate |
| Forms when limestone is changed by heat and pressure | marble |
