Did you ever wonder why you see lightning before you hear thunder? It's because of energy! Energy makes things happen, and two types we see and hear every day are light and sound energy. Light energy travels super fast in straight lines. That's why shadows form behind objects; they are blocking the light! An interesting thing about light is it can bounce off shiny surfaces like a mirror. This is called reflection. It can also bend when it passes through different things like water or a prism. This is called refraction. Now, let's talk about sound. Sound energy travels by making air particles vibrate. When you pluck a guitar string, it vibrates and sends waves through the air to your ears. If those waves bounce back from a surface, we call this echo. So, the next time you switch on a light or listen to music, remember, it's all about energy!