7U Volcanoes Pop Quiz

Volcanoes that have not erupted in a long time, but are expected to erupt again in the future are called:

• Active

• Dormant

• Extinct

• Stratovolcano

Volcanoes can NOT be found at this type of plate boundary:

• Continent-Continent Convergent Boundaries

• Ocean-Ocean Convergent Boundaries

• Ocean-Continent Convergent Boundaries

• Ocean-Ocean Divergent Boundaries

The most 'explosive' type of Volcano is:

• Shield

• Composite

• Dormant

• Hot Spot

The magma chamber connects to the surface through the:

• Main Vent

• Crater

• Secondary Cone

• Sill

Debris flows and mudflows that originate from a volcano are called:

• Tsunamis

• Tephra

• Lava

• Lahars

This volcanic hazard is extremely dangerous because they can reach temperatures of 1500 degrees Fahrenheit and speeds up to 450 miles per hour.

• Lava

• Pyroclastic Flow

• Lahars

• Volcanic Bombs

Approximately 70% of the world's composite volcanoes are located around the Pacific Ocean in a region called the ____________. 

• Volcanic Ring

• Pacific Volcano Center

• Ring of Fire

• Line of Lava Flows

What type of volcano is shown on the model above? 

• Composite Volcano
• Shield Volcano
• Cinder Cone Volcano

What is the difference between magma and lava? 

• Where it is found (above or below the surface)
• How hot the molten rock is (lava is hotter than magma)
•  The type of boundary where it forms
• The viscosity of the molten rock (lava has a lower viscosity)

What causes a volcano to erupt? (Hint: Think of a soda can)

• Expanding gases
• Expanding magma
• Expanding lava
• Expanding silica