SI

Si is a type of energy created by atoms. Atoms are the tiny building blocks that make up everything in the universe, including you and me. Si is created when the atoms in something (like water or air) get excited and make extra energy. This extra energy moves around and can be used in many different ways. It can light up a bulb, power a computer, or make a machine work. It's like the electricity that helps to makes our lives easier and more interesting.