Law of Conservation Definition

Learn about the law of conservation, where energy cannot be created or destroyed but only transformed. Explore examples, case studies, and statistics in this article.

What is the Law of Conservation?

The law of conservation states that energy cannot be created or destroyed, only transformed from one form to another. This principle applies to all forms of energy, including mechanical, thermal, chemical, and nuclear energy.

Examples of the Law of Conservation

  • When you strike a match and it produces heat and light, the chemical energy stored in the matchstick is converted to thermal and light energy.
  • In a car engine, the chemical energy in gasoline is converted to mechanical energy to move the vehicle.
  • In a nuclear power plant, the energy released from nuclear reactions is converted to electrical energy.

Case Studies

One famous example of the law of conservation is the story of Archimedes, who discovered how to determine the volume of irregular objects using water displacement. According to the principle, the water displaced by an irregular object is equal to the volume of the object, demonstrating the conservation of mass.

Statistics on Energy Conservation

According to the U.S. Energy Information Administration, energy consumption in the United States has been steadily increasing over the years. In 2019, the country consumed over 100 quadrillion BTU of energy, with petroleum and natural gas being the most widely used energy sources.


The law of conservation is a fundamental principle in physics that governs the behavior of energy in nature. By understanding and applying this law, we can better manage our resources and work towards a more sustainable future.

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