What are photochemical reactions?

Photochemical reactions are when light helps make changes in things around us.

Imagine you're playing outside on a sunny day and your shirt starts to fade because it’s been in the sun too long. That fading is like a photochemical reaction happening right in front of you!

When light hits something, it can give that thing energy, kind of like giving it a little push. If the thing is special, that push can help it change into something new.

For example, plants use light to turn water and carbon dioxide into sugar and oxygen. This process is called photosynthesis, and it’s how plants grow. It's like they're eating sunlight!

Think about your sunscreen. When you put it on before going out in the sun, it helps protect your skin from getting too hot or burned. That happens because the sunscreen is doing a kind of photochemical reaction, it’s using light to change how energy affects your skin.

So next time you're outside, remember: light isn’t just bright, it can help make changes all around us!