Weather balloon

A weather balloon is like a big balloon that is used to take pictures and measurements of the weather up in the sky. It's kind of like sending a spy up into the air to see what's going on up there! The balloon is filled with helium, which makes it rise up into the sky.

The people who send up the balloon attach a little box to it that has all sorts of sensors and instruments inside. These instruments measure things like temperature, pressure, and humidity in the air. The box also has a radio inside that sends all the information back down to the people on the ground.

As the balloon goes up higher and higher into the sky, it gets colder and the air pressure gets lower. This can make the balloon expand until it finally pops and comes back down to Earth. When this happens, people who are watching for it can use a parachute to help it come down safely, and they can collect all the information that the box recorded while it was up in the sky.

All of this information helps scientists and meteorologists to better understand the weather patterns and conditions up in the sky, which can help them to make predictions about what the weather will be like in the future. So in a way, the weather balloon is like a little explorer that helps us learn more about the world around us!