Volcanos year 10

At which type of plate boundary do most volcanoes form when plates collide?

• Divergent
• Convergent
• Transform

Answer explanation

At convergent boundaries, an oceanic plate subducts beneath a continental plate, leading to magma formation and volcanoes.

What is it called when an oceanic plate sinks below a continental plate, forming a volcano?

• Subduction
• Convection
• Rift valley

Answer explanation

Subduction occurs when a denser oceanic plate sinks below a lighter continental plate, melting into magma that forms volcanoes.

What type of boundary involves plates moving apart, allowing magma to rise and form volcanoes?

• Convergent
• Divergent
• Transform

Answer explanation

At divergent boundaries, tectonic plates move apart, allowing magma from the mantle to rise and form new volcanic features.

How do hotspot volcanoes form?

• By magma rising at a plate boundary
• By magma rising from a deep mantle plume
• By plates colliding

Answer explanation

Hotspot volcanoes form away from plate boundaries, where hot magma rises from deep mantle plumes, creating volcanoes like those in Hawaii.

What stage of a volcano’s life cycle is it in if it is currently erupting or showing activity?

• Dormant
• Active
• Extinct

Answer explanation

An active volcano is currently erupting or showing signs of activity such as gas emissions or earthquakes.

A volcano that has not erupted in a long time but may erupt again is called what?

• Extinct
• Active
• Dormant

Answer explanation

A dormant volcano is currently inactive but has the potential to erupt again in the future.

What is the final stage of a volcano’s life cycle when it no longer has a magma supply?

• Active
• Extinct
• Dormant

Answer explanation

An extinct volcano has no remaining magma supply and is unlikely to erupt again, having reached the end of its life cycle.

What geological process creates a new volcano at a divergent boundary?

• Magma cools underground
• Magma rises as plates pull apart
• Plates slide past each other

Answer explanation

At divergent boundaries, plates move apart, allowing magma from the mantle to rise, creating new volcanic landforms.

What feature forms when magma collects beneath the Earth’s crust before rising to form a volcano?

• Magma chamber
• Lava flow
• Ash cloud

Answer explanation

The magma chamber is a large reservoir of molten rock beneath the surface, supplying magma during volcanic eruptions.

What term describes the process of magma forcing its way through cracks in the crust?

• Subduction
• Eruption
• Intrusion

Answer explanation

Intrusion is the process where magma pushes its way into cracks and fractures in the crust before an eruption occurs.