Answer: There are three types of rocks: sedimentary, igneous, and metamorphic rocks. Sedimentary rocks are formed from sediments under pressure. Igneous rocks are formed by melting. Metamorphic rocks are created when another type of rock is exposed to extreme levels of heat or pressure.
Step-by-step explanation:
how metamorphic rocks are formed
through the process of metamorphism. As a result of changes in temperature, pressure, or the composition of pore fluids, these rocks have been crystallized in a solid-state to such an extent that the diagnostic features of the original rocks are modified.
how sedimentary rocks are formed
The main contributors to sedimentary rock formation are erosion, precipitation, or natural weathering; as well as lithification and dissolution.
Some of the more common types of sedimentary rock include sandstone, shale, limestone and coal.
There are two types of sedimentary rocks, referred to as either detritus or chemical.
how igneous rocks are formed
In essence, igneous rocks are formed through the cooling and solidification of magma ( or lava). As hot, molten rock rises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize.