Rock cycle is the process of transforming one to another. Sedimentary rock forms by cementation and compaction. Metamorphic rock made when magma cool yet, it gets heat and pressure. Metamorphic rock melts and turns to magma. When magma solidifies it forms an igneous rock. Weathering breaks down the rock into smaller rocks. Erosion moves the sediments to another places. Compaction packs up the rocks and cementation squeeze it together finally forms a sedimentary rock. The rock cycle happens like that overtime.
Rocks
Metamorphic rock: When the magma cool yet, it gets heat and preassure.
Magma: Is a melted rock inside of the earth. 
Lava: Is outside (pouring) of the volcano.
Solidification: Cooling, the rock becomes hard.
Igneous Rock: When the magma solidifies down and gets hard.
Weathering: Changes of climate, and it breaks down the rock.
Erosion: Carries away the rock. 
Sediment: Rock metals carried by water, ice or wind.
Compaction: The movement of packing or being packed.
Cementation: Is when the sediment turns to hard rocks surrounds cements.
Sedimentary Rock: It forms from sediments that gets glue together.
Rock Types
Igneous Rock
Intrusive: Big crystals
Extrusive: Small crystalsSedimentary Rock
Clastic: Sand/stones
Crystalline: Shiny, sparkles
Bioclastic: Coal (black)Metamorphic Rock
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