Answer :
Final answer:
When molten material erupts on the Earth's surface, it is called lava. This term differentiates it from magma, which is the molten rock located underground. Understanding these terms is essential for studying volcanic activity.
Explanation:
Understanding Lava
When molten material erupts onto the Earth's surface and flows, it is referred to as lava. This term specifically describes the molten rock that has reached the surface during a volcanic eruption. In contrast, the material that remains underground before it erupts is called magma.
Lava can take various forms depending on its temperature and chemical composition, resulting in different types such as:
- Basaltic lava, which is typically low in viscosity and flows easily, creating broad, shield volcanoes.
- Andesitic lava, which has a higher viscosity and can lead to more explosive eruptions.
Distinguishing Terms
It's essential to distinguish between the different terms related to volcanic activity:
- Magma: Molten rock beneath the Earth's surface.
- Lava: Molten rock that erupts onto the surface.
- Tuff: A type of rock formed from volcanic ash.
- Pyroclastic materials: Fragments of rock and ash ejected during explosive volcanic eruptions.
In summary, the correct answer to the question is option C) lava.
Learn more about lava here:
https://brainly.com/question/41348261
