Hoarfrost

Okay kiddo, have you ever seen frost on the grass in the morning? Well, hoarfrost is a special kind of frost that looks extra cool and spiky!

When the air outside is really really cold, it can cause moisture in the air to freeze onto surfaces like leaves, branches, and fences. When the moisture freezes like this, it creates hoarfrost.

The word "hoar" means "old" or "gray", and this frost gets its name because it makes things look kind of old and gray. It's also really delicate and fragile, so if you touch it, it might break off and melt in your hand.

Hoarfrost can make things look really pretty when it covers them, but it's also a sign that it's going to be a very chilly day outside!