Volcano Flashcard 2024

Front

What is Tephra?

Back

Pieces of lava thrown out of a volcano during a violent eruption.

Front

What are the main ingredients in magma?

Back

The main ingredients in magma include dissolved gases, silica (SiO2), and iron (Fe). Calcium carbonate (CaCO3) is NOT a main ingredient.

Front

What happens when a volcano no longer sits over a hot spot?

Back

It stops growing.

Front

What is the viscosity of Felsic magma?

Back

High viscosity.

Front

What is the term for small pieces of tephra that can float around in the atmosphere for years?

Back

Volcanic Dust.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is the difference between magma and lava?

Back

Magma is found beneath the Earth's surface, while lava is magma that has erupted onto the surface.

Front

What is a volcanic eruption?

Back

A volcanic eruption is the release of gas, ash, and molten rock from a volcano.

Front

What are dissolved gases in magma?

Back

Dissolved gases are gases that are trapped in magma and can cause explosive eruptions when they escape.

Front

What is the role of silica in magma?

Back

Silica (SiO2) affects the viscosity of magma; higher silica content results in higher viscosity.