Year 8 Volcanoes

What is the earth's crust and upper mantle collectively known as?

• Stratosphere

• Asthenosphere

• Lithosphere

• Mesosphere

Where are most of the world's active volcanoes located?

• Along the Arctic plate margin

• Along the Pacific plate margin

• Along the Atlantic plate margin

• Along the Indian plate margin

Where are hotspot volcanoes formed?

• At tectonic plate boundaries

• Under the ocean

• Away from tectonic plate boundaries

• At transform plate margins

What is the name for the layers of ash and lava formed by composite volcanoes?

• Strata

• Tephra

• Pyroclastic flow

• Stratosphere

At which plate margin do oceanic and continental plates move towards each other?

• Divergent plate margin

• Transform plate margin

• Subduction plate margin

• Convergent plate margin

Which type of volcano is commonly found on destructive plate margins?

• Shield volcano

• Composite volcano

• Cinder cone volcano

• Lava dome volcano

How many active volcanoes are there on earth?

• Over 500

• Over 600

• Over 800

• Over 700

What is the name for the mixture of extinct and active volcanoes that have broken through the middle of the Pacific plate?

• Hawaiian Islands

• Cascade Range

• Andes Mountains

• Rocky Mountains

What is the name for magma that has reached the surface of the earth?

• Lava

• Pumice

• Pyroclastic flow

• Tephra

Which type of plate margin allows extremely hot magma to rise up from deep within the planet?

• Transform plate margin

• Convergent plate margin

• Subduction plate margin

• Divergent plate margin