Rocks go through a cycle of transformation. Magma rises to the Earth's surface and solidifies to form igneous rocks.The igneous rocks are broken down into smaller pieces by the forces of water, wind and waves to form sediments. These sediments consolidate to form sedimentary rocks. The igneous and sedimentary rocks change into metamorphic rocks due to extreme pressure and heat. These rocks melt to form new magma. This process is called the rock cycle.