Sectieoverzicht
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Leerlingen moetenAls voltooid aanduiden
Energy is the ability to do work. The amount of work done tells us how much energy has been transferred from one form to another.
Energy can be described as in different 'stores'. It cannot be created or destroyed but it can be transferred, dissipated, or stored in different ways.
Energy can be stored or transferred but it cannot be used up. For example, energy is stored in the chemical bonds of molecules in diesel oil and oxygen molecules in the air. This energy is transferred in combustion and allows the car to move and accelerate.
Where there are energy transfers in a system, the total energy associated with the system stays the same. Energy is measured in joules (J).
Types of energy
Forms of energy are simply different types of energy such as heat, light, sound, kinetic and chemical. Energy resources are stores of a particular type of energy.
Examples of energy resources include sunlight, wind, waves, coal, and oil. Chemical energy is a type of energy. Coal is an example of an energy resource of (or store of) chemical energy.
Energy forms
The main forms of energy are:
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