Lava Magma Viscosity and Volcanoes

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

• Hot Spot
• Magma
• Lava
• Volcano

Vocanoes are found...

• on land
• under water
• on islands
• all of the above

What is the most explosive type of magma?

• Rhyolitic Magma
• Andesitic Magma
• Basaltic Magma

Which type of magma has the lowest gas content?

• Basaltic Magma
• Andesitic Magma
• Rhyolitic Magma

The composition of magma determines its _____.

• viscosity
• darkness
• color
• none of the above

Tags

NGSS.MS-PS1-1

TRUE OR FALSE:  A substance that flows quickly has high viscosity...

• True
• False

Very explosive volcanoes tend to have

• Low viscosity magma
• Gases rich in sulfur dioxide
• gentle, sloping sides
• High viscosity magma

Basaltic lave flows are usually _________

• very fluid
• very viscous

Which types of magma contains the least amount of SiO₂

• rhyolitic
• andesitic
• felsic
• basaltic

Which list places the magma types in order of decreasing viscosity (most viscous listed first)?

• basaltic, andesitic, rhyolitic
• rhyolitic, andesitic, basaltic
• andesitic, basaltic, rhyolitic
• basaltic, rhyolitic, andesitic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4