Science 8 Review

When did the Mount Pinatubo eruption occur?

• 2001

• 1981

• 2011

• 1991

What global effect did Mount Pinatubo's sulfur dioxide emissions have?

• Permanent warming of Earth’s climate
• Cooling by 2°F
• Significant warming effect on local weather
• C. Temporary cooling by 1°F

How does higher temperature affect lava viscosity?

• Increases temperature
• Decreases viscosity

• Makes lava more solid
• Reduces flow rate

Which type of eruption is considered the most explosive?

• Strombolian

• Phreatic

• Surtseyan

• Plinian

Which eruption type is associated with glowing pyroclastic flows?

• Plinian

• Strombolian

• Vulcanian

• Pelean

What type of eruption involves magma interacting with shallow water?

• Strombolian

• Surtseyan

• Phreatomagmatic

• Plinian

What is a defining feature of phreatic eruptions?

• Volcanic ash clouds

• Steam-driven explosions

• Lava domes

• Basaltic lava flows

What should you NOT do during a volcanic eruption?

• Use a fan to blow ash away from windows

• Stay indoors and ignore warnings

• Drink plenty of water to stay hydrated

• Leave doors and windows open indoors

What safety measure is critical before a volcanic eruption?

• Secure food, water, and documents

• Drive toward the volcano for observation

• Open doors for airflow

• Collect volcanic samples

What type of eruption often occurs beneath glaciers?

• Subglacial

• Plinian

• Strombolian

• Phreatomagmatic