Barograph

Okay kiddo, have you ever seen a chart that shows how the weather changes over time? That's kind of what a barograph does, but for air pressure instead of weather.

Air pressure is how heavy the air is in a certain area. A barograph measures how heavy the air is and draws a little graph to show how the air pressure changes over time.

It's like a very fancy kind of ruler that measures how heavy the air is and writes it down on paper so we can see it. This helps scientists and meteorologists understand how the weather is going to change in the future.