What name is given to the semi-molten rock found in the Earth's mantle?
The semi-molten rock found in the Earth's mantle is called "magma." Magma is a mixture of molten rock, dissolved gases, and mineral crystals that forms beneath the Earth's surface. It can eventually make its way to the surface through volcanic activity, where it's then referred to as "lava." Magma plays a crucial role in the dynamics of the Earth's geology, including the formation of igneous rocks and the processes that drive plate tectonics and volcanic eruptions.