Volcanoes and Earthquakes

Magma is the molten rock that is found beneath the Earth's surface. When it erupts onto the surface, it is called lava.

A tsunami is a large wave caused by an underwater earthquake or landslide, not a type of volcanic eruption.

The epicenter is the point on the Earth's surface directly above the hypocenter, which is the point where the earthquake starts.

The Richter scale measures the magnitude of an earthquake, which is a measure of the energy released during the earthquake.

T-waves are not a type of seismic wave. P-waves are primary waves, S-waves are secondary waves, and L-waves are surface waves.

Lava is the molten rock that flows out of a volcano during an eruption. Magma is the molten rock that is found beneath the Earth's surface.

Granite is not a type of volcanic rock. It is an igneous rock that is formed when magma cools and solidifies beneath the Earth's surface.

Eruption is the process by which magma rises to the Earth's surface. Intrusion is the process by which magma cools and solidifies beneath the Earth's surface.

Reverse faults are not a type of earthquake fault. Strike-slip faults, dip-slip faults, and normal faults are all types of earthquake faults.

Divergence is the process by which two tectonic plates move away from each other.

Oxygen is not a type of volcanic gas. Carbon dioxide, sulfur dioxide, and water vapor are all types of volcanic gases.

Subduction is the process by which one tectonic plate moves beneath another.

Lava domes are not a type of volcanic cone. Cinder cones, shield volcanoes, and composite volcanoes are all types of volcanic cones.

Transform boundaries are the boundaries between tectonic plates where the plates move past each other.

R-waves are not a type of earthquake wave. P-waves, S-waves, and L-waves are all types of earthquake waves.