Yes it was due to large asteroids impacting on the earth causing intense heat which in turn created magma from the rock.
Magma that reaches the Earth's surface is known as lava.
Once magma has reached the surface, it is refered to as lava.
Magma is molten rock beneath the Earth's surface, while lava is magma that reaches the surface through a volcano or fissure. So, while all lava was once magma, not all magma will reach the surface as lava.
Magma becomes lava after reaching a volcano's vent.Volcanoes have a pocket beneath the surface called a magma chamber. The magma moves upward through a pipe, witch is a long tube that connects the magma chamber to the surface.Molten rocks and gas through it's opening called a vent.It's all written here in a text book called Prentice Hall Earth Science. This information is at page 210.
The molten rock inside the Earth is called magma. When magma reaches the surface, it is called lava.
Magma that reaches the Earth's surface is known as lava.
magma oozing out of cracks in earth's surface is called
The big-bang originated it. The Earth's magma is still very hot. The Earth is heated by the Sun and slightly by the magma once it is located very deep in the Earth, although reaching 1.500ºC
It hardens because it cools.
Melted material that rises from the mantle is called magma. Once magma reaches the Earth's surface, it is then referred to as lava.
It's called magma when it is under the earth's surface. Once it erupts or becomes visible on the surface, its called lava
Magma is a type of molten rock underground. Hope this helps. :)