Barometric Pressure

A barometer is used to measure atmospheric pressure. Here are a few pictures of barometers that have been used over time.

This is our homemade Barometer: 

                                                           

This is a barometric pressure map of Georgia:

We measured the barometric pressure by marking where the tip of our straw was ever day, and checking the barometric pressure for that day. This way we were able to see whether the straw went up or down when the pressure went up and down. We saw that as the pressure went up the balloon was pushed down, moving the straw up. As pressure went down, the straw moved down, since the balloon was being forced up. This is the chart I made on Excel for our in class data.