GEOLOGY

Detailed explanation-1: -These are the rocks that form at erupting volcanoes and oozing fissures. The magma, called lava when molten rock erupts on the surface, cools and solidifies almost instantly when it is exposed to the relatively cool temperature of the atmosphere.

Detailed explanation-2: -Magma that has erupted is called lava.

Detailed explanation-3: -Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust.

Detailed explanation-4: -When magma reaches Earth’s surface and erupts from a volcano, it becomes lava.

Detailed explanation-5: -The magma rises and collects in chambers within the crust. As magma fills the chamber, pressure grows. If the pressure gets high enough, the magma can break through the crust and spew out in a volcanic eruption.