Science 9 - 4th Quarter Midterm Review

Where do most volcanoes occur?

• divergent boundary

• transform boundary

• convergent boundary

• geothermal boundary

What do you call a fast moving current of hot gas and rock moving away from a volcano?

• pyroclastic flow

• tephra

• lahar

• magma

The Ring of Fire is located around which ocean?

• Atlantic Ocean

• Indian Ocean

• Pacific Ocean

• Arctic Ocean

Which one of these does NOT affect the temperature at which magma forms?

• Pressure
• Composition of material
• Water
• Viscosity

What is letter A in the picture?

• Vent
• Crater
• Conduit
• Tephra

What type of lava tends to trap water vapor and other gases and can become explosive?

• lava high in iron or magnesium

• lava that is silica-rich

• basalt

• pyroclastic

Which of the following describes shield volcanoes?

• smallest type of volcano, steep sides

• lava blows out of the vent

• alternating layers of lava and ash

• largest type of volcano, sloping sides

Which type of volcano is relatively small and formed by moderate to explosive eruptions?

• shield

• caldera

• hot spot

• cinder cone

Mt. Kilauea in Hawaii would be classified as which type of volcano?

• shield volcano

• cinder cone

• composite volcano

• dormant volcano

Which describes a volcano with quiet eruption?

• magma has high viscosity

• magma has high silica content

• magma has low silica content

• magma doesn’t always flow out of the vent