How to make a Barometer

How does a barometer work? - using a barometer to record data

In learning how to make a barometer, you will need to learn how to use a barometer to record data. Recording data in learning how does a barometer work, do the followings:

• divide each piece of graph paper into seven columns, one for each day of the week.
• to keep the data accurate, tape the paper to a wall and place the bottle close by on a flat tabletop.

• Position the bottle in front of the first column, say, Sunday, so that the straw's red point almost touches the graph paper.
• At the time of day you make your regular temperature, wind, and precipitation measurements, note the position of the pointer and make a small pencil mark on graph paper.
• Move the bottle to the next column.
• Repeat this procedure each day for the duration of your weather window.

How to read a barometer?

In learning how to make a barometer, you must also learn how to read a barometer. The first thing to do when learning how to read a barometer is to: watch your barometer work each day.

• When snow or rain is likely, the air inside the bottle will be heavier than the air outside the bottle, and so the balloon will stretch out a little, dipping the pointer down.
• A nice day means the air outside the bottle will be heavier than the air inside the bottle and the balloon will press down into the bottle, moving the pointer up.
• Each day, mark the barometer's pointer's position on graph paper.
• After the first week, remove the graph paper and replace it with a fresh piece of graph paper for more barometer readings and recordings.
• Connect the dots with lines to create a picture of air pressure patterns.

How to make a barometer