Volcanoes

Front

What is the opening in Earth's crust through which molten rock, gases, and ash erupt?

Back

Volcano

Front

What is molten rock that has formed deep within the Earth?

Back

Magma

Front

Why does magma tend to rise to the surface?

Back

It is less dense than the surrounding material.

Front

The formation of magma depends on which set of conditions?

Back

Temperature, Pressure, and Water Content

Front

The volcanoes on the Hawaiian Islands form due to which of the following? Divergent Boundary, Hot Spot, Subduction Boundary, Transform Boundary

Back

Hot Spot

Front

What is the principal ingredient to all types of magma? Options: Iron, Magnesium, Silica, Water

Back

Silica

Front

What type of lava cools quickly and forms rock with jagged edges? Options: Aa, Magma, Pahoehoe, Pillow Lava

Back

Aa

Front

What type of lava cools slowly and forms rock with smooth, ropelike features?

Back

Pahoehoe

Front

Which type of magma has the lowest amount of silica content?

Back

Basaltic Magma

Front

What is the resistance of a liquid, such as lava, to flow?

Back

Viscosity