How do mountains affect rainfall and air dryness?

Mountains act like big fans that change how much rain falls and how dry the air feels.

Imagine you're walking through a forest on a breezy day. The wind comes from behind you and pushes you forward, making it easier to walk. Now think of mountains as giant walls in the sky, when wind or air hits them, something interesting happens.

When air moves toward a mountain, it has to climb up the slope. As it climbs, it gets cooler, and the water vapor in the air turns into clouds and then rain. This is why places behind mountains, like the side that faces the wind, often get more rain. It's like when you breathe out on a cold day, your breath fogs up because it got colder.

On the other side of the mountain, after the air has gone over the top and come down the other side, it warms up again. This warm air can't hold as much moisture, so it feels drier. It's like when you take a hot shower, the steam disappears quickly once you step out into the room.

So mountains change the weather by acting like big fans that push rain to one side and leave the other side feeling dry.