Volcanoes

What is molten rock beneath the Earth's crust called?

• Magma

• Lava

• Silica

• Cinders

What is molten rock above the Earth's crust called?

• Magma

• Lava

• Silica

• Cinders

What is the resistance of liquid to flowing?

• Surface Tension

• Viscosity

• Lava

• Magma

When lava has more silica what happens to the viscosity?

• It has a lower viscosity

• The viscosity doesn't change

• It has a higher viscosity

What is hot, fast-flowing lava called?

• pahoehoe

• aa

• cox

• narcross

What is cooler, slower moving lava called?

• pahoehoe

• aa

• cox

• narcross

Which volcanic debris is the smallest?

• cinders

• ash

• bombs

Which volcanic debris is the largest?

• cinders

• ash

• bombs

Which volcanic debris is middle sized?

• cinders

• ash

• bombs

Which volcano is made from gradual lava flows that form gentle sloping mountains?

• Cinder cone

• Composite

• Shield