What Is Energy?
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Energy is essential to all human activities, from transportation and heating to lighting and powering everyday devices. Understanding the different forms of energy (kinetic, thermal, electrical, mechanical and others), how energy can be transferred and transformed, and concepts such as energy conservation, power and efficiency is fundamental in science education. These key ideas help explain natural phenomena, everyday technologies and the way energy is used in the world around us.
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Energy’s Main Properties
The energy contained in matter is invisible, but light, movement, wind, and waves are some of the ways it manifests itself. Whether in its natural form or harnessed by humans, energy can be transmitted from one object to another, often through conversion. However, it cannot be created or destroyed: the universe contains a constant, finite amount of energy.
Energy: Efficiency, Power and Measurement
Energy transmission and transformation are governed by fundamental rules that impact our daily activities and the energy efficiency of the world in myriad ways.
Energy in All Its Forms
Stored in objects, molecules and atoms, energy takes many different forms. Whether mechanical, kinetic, thermal, chemical, radiant or nuclear, it can be converted from one form into another.
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