What is the name of the molten rock that is found deep inside volcanoes?
The molten rock found deep inside volcanoes is called "magma." Magma is a mixture of molten rock, minerals, gases, and other materials that forms within the Earth's mantle. As magma rises to the surface during a volcanic eruption, it is then referred to as "lava." The term "magma" is used to describe molten rock while it's still beneath the Earth's surface, and "lava" is used when the molten rock has reached the surface.