2 53) The ________ is the site of initial rupturing associated with an earthquake.

1 50) ________ is the name of the earthquake-magnitude scale based on the amount of seismic energy released during the event.

1 56) ________ is the layer of warm rock below the crust and uppermost mantle that readily deforms and flows plastically.

1 54) What is thought to be the material state (liquid, solid, gas) and elemental composition of Earth's outer core?

1 55) ________ is the cool, brittle, outer layer of Earth that includes the crust and uppermost mantle.

1 49) What instrument is used to record earthquake vibrations?

1 52) An earthquake of magnitude 7.5 releases about how much more energy than one of magnitude 5.5?

1 51) ________ is another name commonly used by scientists to denote seismic sea waves induced by earthquakes.