Energy is the ability to do work. Any change needs energy.
Here you have some of the videos we've watched during lessons. I hope you enjoy them!
There are different forms of energy. You can revise them watching Tim&Moby's video.
Nick Lucid made us learn and laugh at the same time. Do you remember?
If you don't have it clear yet, here you have another good explanation.
It is also important to know what things we can do to save energy.