[Music] energy is all around us scientists define energy as the ability to do work or cause change we cannot see energy but we can see the things that energy does energy makes things move it powers the machines we use it can make things get hotter or produce sound energy is used to light up our homes and cities and power the vehicles we use all organisms need energy to grow reproduce and carry out life processes plants use the light energy from the sun to make food in the form of sugar this energy is passed to animals when they feed on plants and other animals there are two main forms of energy kinetic energy and potential energy kinetic energy is the energy of movement mechanical energy sound light heat and electrical energy are all examples of kinetic energy you can learn more about these forms of kinetic energy in our related videos potential energy is the energy something has due to its position composition or state the stored energy can be converted into various types of kinetic energy fuels such as petroleum gas and wood contain a form of potential energy called chemical energy when these fuels are burned the chemical energy is converted into light and heat potential energy due to an object's position above the ground is called gravitational potential energy a rock on top of a hill has gravitational potential energy as it rolls down the hill the potential energy is converted into kinetic as it is pulled down by the earth's gravity an arrow in a bow has potential energy due to its position behind the drawn string this is called elastic potential energy the elastic potential energy increases the more the string is drawn back when the string is released the potential energy is converted into kinetic energy as the arrow flies forward that's pretty cool be sure to check out our related videos to learn more about different energy forms and conversions thanks for watching bye [Music] don't forget to subscribe you