Volcano Review

Front

What is viscosity in relation to magma?

Back

Viscosity refers to the thickness and resistance to flow of magma. Thick, slow-moving magma has high viscosity.

Front

How does the viscosity of magma affect volcanic eruptions?

Back

Thick and slow-moving magma (high viscosity) leads to explosive eruptions, while thin and fast-moving magma (low viscosity) results in quieter eruptions.

Front

What type of rock is formed from cooled magma or lava?

Back

Igneous rock is formed when magma or lava cools and solidifies.

Front

What are the two main types of igneous rock?

Back

Intrusive (formed inside the Earth) and extrusive (formed on the surface).

Front

What is a volcanic gas?

Back

Volcanic gases are gases emitted during a volcanic eruption, including water vapor, carbon dioxide, and sulfur dioxide.

Front

Which is more dangerous during a volcanic eruption: gas/ash or lava?

Back

Gas and ash are generally more dangerous than lava because they can spread over large areas and cause respiratory issues.

Front

What is a hot spot in geology?

Back

A hot spot is a location where magma from deep within the Earth's mantle rises to the surface, creating volcanic activity.

Front

What is a pyroclastic flow?

Back

A pyroclastic flow is a fast-moving current of hot gas and volcanic matter that flows down the sides of a volcano during an explosive eruption.

Front

True or False: Volcanoes always erupt in the same way.

Back

False. Volcanoes can erupt in different ways depending on various factors such as magma composition and pressure.

Front

What is the difference between magma and lava?

Back

Magma is molten rock beneath the Earth's surface, while lava is magma that has reached the surface.