Volcanoes

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

• Hot Spot
• Magma
• Lava
• Volcano

Why does magma tend to rise to the surface?

• It has large amounts of silica.
• It contains very little silica.
• It is denser than the surrounding material.
• It is less dense than the surrounding material.

The volcanoes on the Hawaiian Islands form due to which of the following?

• Divergent Boundary
• Hot Spot
• Subduction Boundary
• Transform Boundary

Tags

NGSS.HS-ESS2-3

What is the principal ingredient to all types of magma?

• Iron
• Magnesium
• Silica
• Water

What type of lava cools quickly and forms rock with jagged edges?

• Aa
• Magma
• Pahoehoe
• Pillow Lava

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

• Aa
• Magma
• Pahoehoe
• Pillow Lava

Tags

NGSS.MS-ESS2-1

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

• Andesitic Magma

• Basaltic Magma

• Granitic Magma

• Viscous Lava

What are solid rock fragments that are ejected during a volcanic eruption?

• Lahar

• Magma
• Pyroclastic Material
• Silica

What type of volcano has steep slopes made of alternating layers of ash and silica rich lava?

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

What type of volcano is made of explosive lava fragments, called pyroclastic material, that have been ejected from a volcanic vent?

• Caldera

• Cinder Cone

• Composite Volcano

• Shield Volcano