Volcanoes and Earth's Structure Quiz

Which layer of the Earth is the thinnest and varies in thickness from the ocean floor to land?

• Mantle

• Crust

• Outer Core

• Inner Core

What is the primary composition of the Earth's outer core?

• Molten rock

• Solid nickel and iron

• Liquid nickel and iron

• Silicate rocks

What do tectonic plates consist of?

• Crust and inner core

• Inner core and outer core

• Mantle and inner core

• Crust and outer mantle

What is the term for the hot, melted material inside the Earth that erupts during a volcanic eruption?

• Lava

• Cinders

• Magma

• Ash

What is the primary difference between magma and lava?

• Magma is inside the Earth, lava is on the surface

• Magma is solid, lava is liquid

• Magma is found in extinct volcanoes, lava in active ones

• Magma is cooler than lava

Which type of volcano is expected to erupt again but is currently not active?

• Active volcano

• Dormant volcano

• Extinct volcano

• Composite volcano

Which type of volcano is characterized by a broad, shield-like shape with gentle slopes?

• Composite volcano

• Cinder cone

• Shield volcano

• Lava dome

What is the main characteristic of a composite volcano?

• Viscous magma stacking around the vent

• Circular cones and small lava pieces

• Steep sides and thick, sticky lava

• Gentle slopes and runny lava

Which type of volcano is formed by erupting lava that breaks into small pieces and falls back to create cinders?

• Shield volcano

• Composite volcano

• Lava dome

• Cinder cone

Which volcano type is known for having viscous magma that builds up and forms a dome shape?

• Lava dome

• Shield volcano

• Composite volcano

• Cinder cone