Earthquakes and Volcanoes 9

What is the theory that explains the movement of Earth's lithospheric plates?

• Continental Drift

• Earthquake Theory

• Volcanic Eruptions

• Plate Tectonics

Which layer of the Earth is broken into tectonic plates?

• crust

• mantle

• lithosphere

• core

What are the three types of plate boundaries?

• Oceanic boundaries, continental boundaries, and island boundaries

• Divergent boundaries, convergent boundaries, and transform boundaries

• Tectonic boundaries, fault boundaries, and rift boundaries

• Subduction boundaries, collision boundaries, and sliding boundaries

What happens at a convergent plate boundary?

• Two tectonic plates collide and are forced together.

• Two tectonic plates move apart and create a gap.

• Two tectonic plates slide past each other horizontally.

• Two tectonic plates sink beneath one another.

What is the term for the point where an earthquake originates?

• epicenter

• quake source

• seismic center

• fault line

What is the Richter scale used to measure?

• wind speed

• temperature

• population density

• earthquakes

What is the term for a sudden release of energy in the Earth's crust that causes seismic waves?

• earthquake

• tsunami

• volcano eruption

• tornado

What is the main gas released during a volcanic eruption?

• carbon dioxide

• sulfur dioxide

• nitrogen

• oxygen

What is the term for a volcano that has not erupted in a long time but is still considered active?

What is the term for the process by which tectonic plates move apart and new crust is formed?

• Subduction

• Convergence

• Seafloor spreading

• Continental drift