The defense between an earthquake's focus and its epicenter.

The focus is the point within the earth where seismic waves originate; it is centered on the part of the fault that has the greatest movement. The epicenter is on the earth's surface directly above the focus.

The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter. The epicenter is the point on the surface above the focus, the place on the surface that would receive the most intense vibrations.

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a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

d. platinum would have the greatest temperature increase because it has the lowest specific heat.