Question

energy in motion
physical science includes the study of energy. energy is often defined as the ability to do work. there are different kinds of energy. energy holds together molecules, and energy comes from gas and electricity. its what puts things in motion.
a wave is how energy travels. think of an ocean wave. its a type of movement that goes over the surface of the water, and it carries energy that
which of these is an example of energy traveling as a wave?
an earthquake
a battery in a childs toy
a boulder resting on a ledge
a glass of water

Explanation:

An earthquake releases energy in the form of seismic - waves which are waves of energy. A battery stores chemical energy, a boulder at rest has potential energy, and a glass of water has no wave - like energy transfer relevant here.

Answer:

an earthquake