Ans. Magma is an extremely hot liquid which is a semi-liquid rock in its form that is located under the Earth's surface. This magma is able to push through the holes or through the cracks in the crust, which causes a volcano to erupt. When the magma flows or it erupts onto the Earth's surface, this turns into a material called lava. Like solid rock,  magma is a mixture of all other minerals. Magma is quite hotter than the lava, this also depends on how quick the lava reached the surface and also if the magma and the lava are from the same magma chamber below the earth’s surface. Scientists use the term magma for the molten rock which is underground and the lava is used for the molten rock which breaks through the Earth's surface.