All statements are correct. A volcano is a conduit for magma to reach the surface. This process typically forms a circular, funnel-shaped mountain or hill around the vent. Furthermore, they are scientifically categorized based on their eruption history into three primary stages: Active, Dormant and Extinct. ANSWER: (D) All of the above.
Which of the following statements about volcanoes is true? (A) Volcanoes are classified into three main types: active, dormant and extinct. (B) It is a conduit in the Earth’s crust through which molten rock (magma) and other materials erupt. (C) Often, a circular, funnel-shaped hill or mountainous area develops around its vent. (D) All of the above.
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A volcano is more than just a mountain; it is a complex geological system. It begins as a rupture in the crust (conduit) through which magma, ash and gases escape. As this material cools and solidifies around the vent, it builds up the classic cone-shaped structure or a volcanic hill. The classification into active (currently erupting or frequently), dormant (hasn’t erupted recently but could) and extinct (unlikely to erupt again) provides a framework for scientists to assess hazard levels. Together, these features define the mechanical, physical and temporal nature of volcanic activity on Earth.