An example of non-matter is energy. Unlike atoms, gas, and liquid, which are forms of matter, energy itself is not considered matter. Matter refers to anything that has mass and takes up space, while energy is the ability to do work or cause change.
Energy can exist in various forms, such as thermal energy, electrical energy, or kinetic energy. For example, when you turn on a light bulb, electrical energy is converted into light energy. Another example is when you heat water on a stove, thermal energy is transferred to the water, causing it to boil.
It's important to note that although energy is not considered matter, it can still interact with matter and have an effect on it. Energy can be transferred between objects or converted from one form to another, but it does not have a physical substance like atoms or molecules.
I hope this helps!