The word “energy” incorporates a wide variety of realities. If we put aside its pictorial uses, such as “a man full of energy,” energy designates an ability to function in whatever mode: set in motion, heat, compress, illuminate, sound, transmit information, etc. Here, we see various forms of energy.

In everyday expression, “energy available by man,” also known as “free energy,” is referred to as “energy.” So, when we talk about energy use, we have to think about whether we’re talking about the energy that can be used by humans or energy that is available for free.

Various Forms Of Energy

Forms of energy are categorized in a number of ways. One is in the manner in which it enters a person’s service. In this case, a constant value is the quantity of energy. In the course of various chemical and physical processes, it only flows from one form to another with the aid of various kinds of energy carriers. The following are the primary forms of energy found on the planet:

  • Chemical;
  • Radiant (light energy); 
  • Thermal; 
  • Gravitational; 
  • Electrical;
  • Nuclear;
  • Kinetic.
  • Each known source of energy allows for the simultaneous acquisition of one or more of its forms. The sun, for example, emits heat, light, and a wide variety of other forms of radiation. At the same time, electrical energy is generated by the solar battery, which is then converted again into light and heat. It is closely linked to all forms of electricity.

Chemical Energy

Chemical energy is energy “stored” in the atoms of substances that are emitted or consumed within substances by chemical reactions.

forms of energy

Exothermic reactions (such as fuel combustion) release chemical energy in the form of heat, whereas galvanic cells and batteries turn it into electrical energy. High efficiency (up to 98 percent) but low capacity characterize these energy sources.

Radiant Energy

forms of energy

Electromagnetic waves, such as visible light, radio waves, ultraviolet (UV), and infrared rays (IR), are examples of radiant energy. The main feature of this energy is that it can travel in a vacuum without requiring any material support.

Thermal Energy

The energy of disordered (chaotic) movement and molecular interaction of substances is thermal energy.

Thermal energy, most frequently obtained from the combustion of different fuel types, is commonly used for heating and various technical processes are carried out (heating, melting, drying, evaporation, distillation, etc.).

Gravitational Energy

Gravitational energy, which is particularly visible in outer space, is energy generated by the interaction (gravitation) of massive bodies. This is the energy “stored” by a body lifted to a certain height above the Earth’s surface – the energy of gravity – in terrestrial conditions.

Electrical Power

The movement of electric charges within conductive materials induces electricity. Fundamentally, this energy has three effects: luminous, thermal, and magnetic. For instance, the one borne by our homes’ electric current and manifested when turning on a light bulb.

Nuclear Energy

Nuclear energy is the energy stored in the nuclei of atoms and released in nuclear fission and fusion reactions, such as uranium energy, which is manifested in nuclear reactors.

Kinetic Energy

Kinetic energy is one of the forms of energy that is associated with the motion of bodies in motion. As a result, it is determined by the body’s mass and speed; the greater the mass and/or speed, the greater the kinetic energy.


Energy is something without which it is difficult for the not only man to live, but also for all living things on earth. As a result, mankind will still be faced with issues relating to the use of different energy sources and their effects on the climate. 

Even, if the problem of such sources’ renewability is resolved sooner or later, the issue of human-made energy systems’ effects on the planet’s ecology, whether hydroelectric power plants, nuclear energy, or solar panels, is unlikely to fade away.


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