Explain the structure of a volcano with the help of a diagram.
A volcano is an opening in the surface of the Earth from which hot magma flows out. The following are the structural features of a volcano:
Vent: It is an opening from which hot magma flow out to the surface of the Earth. It is a circular pipe like structure.
Crater: It is a bowl shaped like opening or a mouth of a volcano.
Magma chamber: It is here that the hot magma is stored beneath a volcano.
Magma: It is the hot molten fluid, which comes out to the surface during a volcanic eruption.
Lava: When molten magma reaches the surface of the Earth, it is known as lava.