Tectonics

How is the Earth's structure divided?

• Crust, mantle, outer core, inner core

• Crust, ocean, atmosphere, space

• Land, water, air, fire

• Mountains, valleys, rivers, lakes

What forms when lava cools at an oceanic-oceanic destructive plate boundary?

• Fold mountains

• Ocean trenches

• Island arcs

• Sea floor spreading

What natural phenomenon occurs when magma rises at a continental boundary?

• Earthquake

• Tsunami

• Volcano

• Landslide

What happens at constructive margins to form a volcano?

• Magma cools rapidly

• Magma is denser than the plate

• Magma is less dense than the plate

• Magma evaporates

What is the greatest threat from a volcano away from the volcano itself?

• Lava flows

• Pyroclastic flows

• Ash clouds

• Earthquakes

What are lahars?

• Volcanic gases

• Mudflows

• Lava flows

• Earthquakes

What is a super-volcano known for?

• Frequent eruptions

• Destructive ability

• Small eruptions

• Low lava flow

What is the result of subduction at destructive margins?

• Formation of ocean trenches

• Melting of the oceanic plate

• Creation of new crust

• Formation of rift valleys

What is the effect of seismic waves at a conservative boundary?

• Continuous movement

• Sudden seismic waves

• No movement

• Gradual movement

What is the primary cause of tsunamis?

• Wind

• Sub-marine earthquakes

• Tidal forces

• Volcanic eruptions