Let’s start with clouds. Clouds are made up
of water vapor, which has mass and is therefore
matter. This matter can be acted on
energetically, for example, the warmth of the sun
can cause the clouds to expand, but the clouds
themselves are matter.
Electricity is the harder one to categorize.
Let’s first specify that we are talking about
“electric energy,” because electricity can be
defined either as the flow of charge (this is how
physicists usually define it) or the flow of
electric energy (this is how it’s defined in
day-to-day language, like when talking about your
Electricity defined as electric energy is
energy. For example, the electric energy that
goes to a light bulb is transformed by the
lightbulb into other forms of energy, namely
light and heat. Although matter is involved in the
process—e.g. the wires carrying the electrical
current and light bulb doing the transformation,
the electricity that you are talking about is a
form of energy.
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