Lava, Magma, and Other Hot Stuff Magma is hot, melted rock that's below the Earth's surface.
(Lava, Magma, and Other Hot Stuff Magma; is; hot, melted rock that's below the Earth's surface) (hot, melted rock; 's; below the Earth's surface)
Lava, Magma, and Other Hot Stuff Magma hot, melted rock
is 's
hot, melted rock that's below the Earth's surface
below the Earth's surface