| A | B |
|---|
| igneous rocks | rocks made by fire or heat |
| granite | a type of igneous rock |
| sedimentary rocks | made underwater from small pieces of shells and sand |
| sandstone | a type of sedimentary rock |
| metamorphic rocks | formed when igneous and sedimentary rocks are changed by heat or pressure |
| marble | a type of metamorphic rock |
| rock cycle | how igneous and sedimentary rocks turn into metamorphic rocks |
