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 bill).

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.