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

A huge hole that is left behind when a volcano collapses is called a

• Batholith
• Caldera
• Geyser

Tags

NGSS.MS-ESS2-2

Which of the following is an opening through which molten rock and gas leave a volcano

• pipe
• magma chamber
• crater
• vent

What is pyroclastic material?

• Dust, ash and other material that comes out of a volcano.
• A type of magma that is in a volcano.
• A type of volcano.

In which of these years did Mt. St. Helens erupt?

• 1836

• 1999

• 2001

• 1980

What is Viscosity?

• A fluids colour.

• A fluids temperature.

• A fluids resistance to flow.

What factors affect the viscosity of magma as well as determines if a volcano will be explosive?

• amount of dissolved gases

• temperature

• composition

• all of the above

• none of the above

As temperature increases ,viscosity of liquid _______________.

• increases

• stays the same

• decreases

Tags

NGSS.MS-PS1-4

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

_______ lava moves slowly and has a smooth, billowy or ropey surface.

• Aa

• Pahoehoe

• Pillow

• Blocky

Tags

NGSS.MS-ESS2-1