Energy can best be described as

Question

Quizplus · Accepted Answer

Energy is not a substance, but a property or characteristic of a system. It describes the potential or ability of a region of space and the matter within it to do work. This includes mechanical work, thermal energy, electromagnetic radiation, nuclear energy, and other forms of energy.

Incorrect choices:
A) Matter is not the same as energy. Matter has mass and takes up space, whereas energy is a property or characteristic of a system. 
C) The amount of matter in an object is described by its mass, which is different from energy.
D) The change in frequency due to the motion of a wave source is described by the Doppler effect, which is not the same as energy.

Energy Can Best Be Described as