Matter Chemistry Example 4

Follow the full solution, then compare it with the other examples linked below.

Example 4

hard
A student claims that heat and light are forms of matter because they can be detected and measured. Evaluate this claim using the definition of matter.

Solution

  1. 1
    Matter is defined as anything that has both mass and takes up space (occupies volume).
  2. 2
    Heat is the transfer of thermal energy between objects — it has no mass and occupies no space.
  3. 3
    Light is electromagnetic radiation — photons have energy and momentum but zero rest mass and do not occupy volume.
  4. 4
    Therefore, heat and light are forms of energy, not matter. Being detectable or measurable does not make something matter.

Answer

Incorrect — heat and light are energy, not matter (no mass, no volume).\text{Incorrect — heat and light are energy, not matter (no mass, no volume).}
This is a common misconception. The test for matter is whether something has mass AND occupies space. Energy can be detected and measured, but it does not meet both criteria for matter.

About Matter

Anything that has mass and takes up space (has volume), existing in different states such as solids, liquids, gases, and plasma.

Learn more about Matter →

More Matter Examples

Example 1 easy

Define matter and give three examples of things that are matter and three that are not.

Example 2 medium

Classify each as a physical or chemical property: (a) boiling point, (b) flammability, (c) color, (d

Example 3 easy

Is air considered matter? Justify your answer.

← All Matter Examples Matter Concept