Volcanoes Quiz

What is the earth's rocky outermost layer called?

• Magma

• Lithosphere

• Crust

• Mantle

How many active volcanoes are there on earth?

• Over 500

• Over 700

• Over 800

• Over 600

Where are most volcanoes found?

• Under the ocean

• Along tectonic plate margins

• Away from tectonic plate boundaries

• At hot spots

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

• Steam

• Lava

• Thick ash

• Volcanic bomb

What causes the gentle sloping sides of shield volcanoes?

• Gas

• Volcanic bombs

• Thick ash

• Runny lava

Where are composite volcanoes commonly found?

• At hot spots

• Under the ocean

• On destructive plate margins

• Away from tectonic plate boundaries

What is the name for the layers of ash and lava formed by alternate eruptions?

• Strata

• Magma chamber

• Main vent

• Crater

What is the name for the tectonic plate mostly covered by the sea?

• Tectonic plate

• Oceanic plate

• Continental plate

• Magma chamber