Volcanoes: Formation, Types, and Impact

What is the main difference between magma and lava?

• Magma is only found in volcanoes, while lava is found everywhere.

• Magma is cooler than lava.

• Magma is molten rock inside the Earth, while lava is molten rock on the Earth's surface.

• Magma is found on the Earth's surface, while lava is underground.

How are rift volcanoes formed?

• By the accumulation of volcanic ash.

• By the cooling of lava on the Earth's surface.

• By the rising of magma through a gap between diverging tectonic plates.

• By the collision of two tectonic plates.

What is the process called when one tectonic plate is pushed below another?

• Convection

• Subduction

• Erosion

• Divergence

Which type of volcano is characterized by broad, flat structures?

• Shield

• Stratovolcano

• Cinder Cone

• Composite

What are composite volcanoes also known as?

• Shield volcanoes

• Stratovolcanoes

• Cinder cone volcanoes

• Rift volcanoes

Which of the following is an advantage of volcanic activity?

• It causes global cooling.

• It contaminates water supplies.

• It leads to frequent earthquakes.

• It provides fertile soil for agriculture.

What can volcanic ash do to the climate?

• Have no effect

• Only affect local weather

• Cause global cooling

• Increase global temperatures

Which volcano is taller than Mount Everest when measured from its base?

• Mauna Loa

• Vesuvius

• Krakatoa

• Mount St. Helens

What was significant about the eruption of Mount St. Helens in 1980?

• It created a new island.

• It caused a global temperature rise.

• It was the largest eruption in world history.

• It was the worst volcanic eruption in U.S. history.

Which moon in our solar system has active volcanoes?

• Europa

• Titan

• Ganymede

• Io