2.2 THE PRODUCTION OF ELECTRICITY ENERGY Definition and classification In our daily lives we use energy to make everything around us work; cars, lights, household appliances, all require and even our body needs energy from the food we eat to grow and move. We can say that energy is the capacity or power to function. Energy comes in different forms and can be simply classified into two categories: energy is energy in motion, such as the movement of the wind, water, or of someone running. Kinetic energy is the energy stored in objects that are at rest, and its quantity depends on the object's position at rest. Potential energy 1 DO Search the Internet to find out how much energy is being used across the world at the same time and how much energy you need to Google something. 1 Forms of energy There are different kinds of that imply the motion of electrons, atoms, molecules, substances, and objects: kinetic energy Electrical Mechanical Thermal Sound Electromagnetic Examples of are: potential energy Chemical Gravitational Nuclear All of these forms of energy can be transformed from one form into another. Where do we get energy from? Over the years, people have used a variety of energy sources: early humans used wood to get light and heat and to cook their food. Later, coal was widely used, not only for primary or basic needs, but also to travel and produce things much faster and much more easily and quickly than before. 1 Nowadays, in order to satisfy the high demand for energy, people use a great variety of resources, which are usually grouped into two categories: : resources such as coal and oil which have a limited ; once they are used up, they cannot be . Non- renewable supply replenished : resources with an unlimited supply because they are always naturally available; examples are solar or wind energy. Renewable MORE The invention of the in the 17 century led to the Industrial Revolution that spread from Britain to the rest of the world and brought great changes to life on Earth. 1 steam engine th