This project and its actions were made possible due to co-financing by the European Fund for the Integration of Third-Country Nationals EAL Nexus resource Rocks Subject(s): Geography, Science Age group(s): 12–14, 15–16 Topic: Rocks cycle vocabulary Licence information | This resource is free to use for educational purposes. ©British Council 2014 Source | This resource was originally developed by Nerissa Lea and has been adapted by EAL Nexus. rock cycle brittle crack crumble crystals dike erosion expansion or contraction fossil freeze thaw igneous lava magma metamorphic rock molten rock scree sediment sedimentary sill texture volcano weathering The repeated breaking and building of rocks a mountain that may erupt hot liquid rock lava magma molten rock above ground a mixture of molten or semimolten rock underground fracture a vertical crack filled with magma a horizontal crack filled with magma the solidification of a substance small particle of rock rock formed from sediment evidence of living things preserved in rocks rock formed when magma cools rock changed by heat or pressure repeated freezing and thawing of water growth and shrinkage caused by heating and cooling of rocks physical and chemical breakdown of rocks the movement of weathered rock disintegration, falling apart can be broken up easily sharp fragments of loose rock on mountain slopes the appearance and feel of a substance