Different size igneous crystals form ... - ...depending on how much time they cool for., Igneous rocks... - ...are made from magma which has cooled and solidified., Metamorphic rocks... - ...require heat and pressure to form but without melting., Sedimentary rocks... - ...require multiple processes to form., Weathering can... - ...occur through chemical, biological or physical means., Transportation and deposition... - ...are the first processes that need to happen for sedimentary rock formation to occur., Sedimentation... - ...is the build up of layers which can contain fossils., Compaction and cementation... - ...is where water and air are squeezed out from between layers and new rock crystals form., Large igneous crystals... - ...need a long time to cool so that they can become ordered., Although we call it a rock cycle... - ...each type of rock can directly become either of the other two types. ,

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