Question

3. What are volcanoes? Draw a labelled diagram of
a volcano.​

Answer 1

Answer:

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 erupting volcano The main parts of a volcano are 1) the crater, a depression at the top of the volcano from which volcanic material has been ejected; 2) the vent, the conduit between crater and the magma; and 3) the cone, the area around the crater at the top of the volcano.

Answer 2

Answer:

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A volcano is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. Volcanic eruptions are partly driven by pressure from dissolved gas, much as escaping gases force the cork out of a bottle of champagne. Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth’s crust. As the magma rises, pressure decreases, allowing the gases to form bubbles. How the magma (lava) behaves when it reaches the surface depends on both its gas content and chemical composition.