The rock of our geosphere is constantly changing through a process called the rock cycle.

Underground, heat, and pressure are key forces that transform rock.

Rock can be formed from cooling and crystalizing magma and lava, creating igneous rock.

Rock can be transformed by heat and pressure into metamorphic rock.

Near the surface, rock breaks down by weathering.

Near the surface, sediments move by erosion.

Rock is formed from deposited and compacted sediments over time, resulting in sedimentary rock.