Volcanoes Introduction

Most volcanoes are found at the edge of _ _ _ _ _ _ _ _ plates:

What is the name of the path that traces the boundaries between several tectonic plates around the Pacific Ocean?

• Ring of Fire

• Ring of Ice

• Ring of Heat

• Ring of Earth

What is the primary factor used to classify volcanoes?

• Shape and size

• Location

• Eruption style

• Age

Which type of volcano often appears as tall steep mountains?

• Stratovolcanoes

• Shield volcanoes

• Calderas

• Mid-ocean ridges

Which type of volcano is more dome shaped?

• Stratovolcanoes

• Shield volcanoes

• Calderas

• Mid-ocean ridges

What does magma become known as once it reaches the Earth's surface?

• Molten magma

• Basalt

• Lava

• Pyroclastic flow

What is the temperature range that lava can reach?

• Below freezing point

• 100-500 degrees Fahrenheit

• 500-1000 degrees Fahrenheit

• Over 2000 degrees Fahrenheit

What is the phenomenon called when a volcano erupts with searing hot gas and ash racing down its sides?

• Pyroclastic flow

• Lahar

• Magma chamber

• Tephra

What is the highest category on the Volcanic Explosivity Index (VEI)?

• VEI 5

• VEI 7

• VEI 9

• VEI 8

Which volcanic eruption caused earthquakes, tsunamis, and pyroclastic flows in Indonesia in 1815?

• Mount St. Helens

• Mount Vesuvius

• Mount Tambora

• Mount Krakatoa