We collect, change, store and channel energy to do our work. We don't see energy, but we see its results.
Energy changes things.
People use energy to heat or cool things, to light things up, to move things or to make machines work. We need a way to collect, change, store, and channel energy to use it for even simple things like cooking our meals or heating our homes. There are many ways to collect, change, store, and channel energy. We collect energy from the sun with solar collectors. We mine coal and uranium.