Understanding Tsunamis

What is the most common cause of tsunamis?

• Landslides

• Earthquakes

• Volcanic eruptions

• Meteorite impacts

What percentage of tsunamis are generated by earthquakes?

• 60%

• 80%

• 72%

• 50%

What is the main cause of major tsunami events?

• Subduction

• Meteorite impacts

• Transform boundaries

• Spreading boundaries

What is the 'Ring of Fire'?

• A region with many transform boundaries

• A region with frequent meteorite impacts

• A region with many subduction zones

• A region with frequent volcanic eruptions

Where do earthquakes that generate tsunamis most often occur?

• Where tectonic plates diverge

• Where tectonic plates converge

• In the middle of tectonic plates

• Where tectonic plates transform

What happens during a submarine landslide?

• The sea level rises permanently

• The water temperature increases

• Sediment moves along the sea floor

• The sea floor cracks open

What type of boundary involves two plates moving away from each other?

• Convergent

• Spreading

• Transform

• Subduction

What is a plate boundary?

• The edge of a tectonic plate

• The area where two plates come into contact

• The center of a tectonic plate

• The highest point of a tectonic plate

What is the role of gravitational forces in a submarine landslide?

• They prevent the landslide

• They cause the sea level to rise

• They propagate the tsunami

• They stabilize the sea floor

What happens when lava enters the sea?

• It cools down immediately

• It causes a tsunami

• It evaporates the water

• It forms new land