Hi, my name is Stephan. Today, I'm going to be speaking on independent learning math projects. A good project I like to do is, take a small, a very small container of water and put this container of water in a window sill on the first floor. And then, I take another container, identical, with the same amount of water in it. And I'll put it on the top floor, the highest floor. And then, what I would do is, I'll get the time of the first floor and the time of the second floor or the top floor. The time that it takes for the containers to evaporate. And what you're going to find is, that the container on the first floor, it's always going to be greater than the container on the top floor. Because the atmospheric pressure or the density on the first floor, it causes the water to evaporate slowly. And there's a good independent math project.