What is energy?
Energy is the ability to do work. It's what you get when you burn fuel(= stored energy) to move something like a car or kick a ball (= do work). That fuel can be stuff like coal or gas or the hydrogen which powers the sun. What you get is heat and light energy. You can feel the heat from a fire or from the sun on your skin. And sunlight makes our daytime.
changed from one form to another but it can't be created or destroyedEnergy can be
People have learned to use stored energy to do useful work for them. By burning coal, you can use the chemical energy stored in the coal to heat up water until it becomes steam which then drives large machines to generate electricity. Electricity is another form of energy and it too can be made to do useful work, like running your washing machine or powering your computer and mp3 player. But electricity doesn't have to be made by burning coal. It can be made from renewable energy sources like wind and water power. It can also be made by nuclear power,
Types of Energy
Potential energy is stored in some sort of solid body and has the potential to do work. There are four types:
Chemical: energy stored
in things like the food you eat, fossil fuels and explosives
There are many different types of energy but they're
really all variations of one (or some) of these:
I used a lot of energy writing this! Now what sort of energy would that be...?