Question

A teacher has given a group assignment to classify certain things as matter or energy. Most of the students in the group have decided on the following classification:

Matter: atoms, sugar, water, air
Energy: heat, potential, kinetic, sound

However, there is one student who is arguing that all of the things listed in both categories can be classified as energy, and so that must mean that they can all be classified as matter, too.

Which of the following provides the best scientific explanation as to why the things classified as energy are not also classified as matter?

Answer 1

The things classified as energy can not be classified as matter based on the description of both.

• Energy is just the ability or the capacity to get work done. Energy in itself is massless, it is just a property of a body, a system or an object.
• Matter refers to any entity that has mass and occupy space. A matter can be a solid, liquid, or even a gas.  

From these definitions, it is clear that the things classified as energy can not also be classified as matter. Energy is just a property or a concept.

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