Volcanoes

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

• Divergent Boundary
• Magma
• Subduction Boundary
• Volcano

Tags

NGSS.MS-ESS3-2

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

Where are most volcanoes found?

• Southern Hemisphere
• Ring of Fire
• Mid-Atlantic Ridge
• Hot Spots

What is molten rock that has reached the Earth's surface?

• Aa
• Lava
• Magma
• Pahoehoe

What kind of magma produces violent volcanic eruptions?

• Magma low in silica
• Magma that is fluid, and runny
• Magma that is high in gas content
• Magma rich in iron

What type of volcano is Mount St. Helens?

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

Where do volcanoes come from?

• Places where plates move apart
• Places where plates are moving together
• Hot Spots
• All of these options

Tags

NGSS.MS-ESS2-2

What factor(s) determine(s) whether an eruption will be explosive?

• The amount of gases in the magma
• The amount of silica in the magma
• The amount of gas and silica in the magma
• None of these affect the explosiveness of the volcano