Natural Science CLEP Prep Practice Exam

Question: 1 / 400

What type of eruption is a volcano classified as depending on the size of material that is released?

Explosive

Lava

Plinian

Pyroclastic

Volcanic eruptions are classified based on the physical properties of the material being released, specifically the size of the material. Explosive eruptions involve the release of dense, superheated ash and gas, while lava eruptions involve the flow of molten lava. Plinian eruptions are large, explosive eruptions that produce tall columns of ash and gas. Pyroclastic eruptions involve the release of hot, pyroclastic material such as ash, rocks, and gas. Pyroclastic eruptions are considered the most dangerous type of eruption because of the high velocity and destructive nature of the material being released. Therefore, D is the correct answer as it describes the type of eruption based on the size of material released. Options A, B, and C may also be classifications of volcanic eruptions, but they do not specifically refer to the size of material being released.

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