Rocks which have been formed by the cooling and solidification of molten magma are called

Igneous rocks form when hot melted rock cools and hardens. The word “igneous” comes from Latin for fire.

Granite and basalt are common igneous rocks. Volcanoes produce igneous rocks when lava cools.

Sedimentary rocks form from layers of sediment. Metamorphic rocks form when other rocks change under heat and pressure.