Keep your barometer indoors and in a place where it won’t get bumped.You can put two straws together by cutting a small slit in the end of a straw, squeezing it to make the end smaller, and slipping it into another straw. A longer straw will make the barometer more accurate. Tape the end of the straw onto the middle of your balloon lid.Make sure it’s not loose or saggy…we need our jar to be sealed nice and tight! If you don’t have a balloon use plastic wrap. Make sure it’s nice and tight and secure with a rubber band. Stretch the balloon so that it fits over the mouth of the jar.Cut a small slit in the end of the balloon. Gather your supplies! You’ll need a glass jar, ruler, straw, balloon or plastic wrap, scissors, tape, and a rubber band.High pressure causes air to flow down and fan out near the ground, keeping clouds from forming-so nice weather! When air pressure is low, air flows together and then upward where it gathers, rising, cooling, and forming clouds-stormy weather! You can monitor the atmospheric pressure in your town by building your own barometer! TIP: It won’t be exciting at first, but if you watch for several days, you’ll notice the pressure is changing without Weather is controlled by changes in air pressure-high and low pressure systems (remember these are represented by “H” and “L” on our weather maps!). Atmospheric pressure is the weight of the atmosphere overhead! Meteorologists track atmospheric pressure because a change in atmospheric pressure means a change in weather. Try some of the other activities included here!Ī barometer measures atmospheric pressure.Why did you forecast that? What data did you base your forecast off of? After a few days try forecasting the weather. Fill out your observation journal! Try and fill it out at the same time every day to be able to make the most accurate forecasts.Decorate your cover! Attach the journal pages to the cover using stapler or by punching a hole at top and bottom and tying together with string! You can use plain paper or print off our journal pages. Place your journal paper inside the cover. Fold your paper and cover paper in half.If you want to make a book, you’ll need a stapler or hole punch and string too. Gather your supplies! You’ll need paper (or you can print the handy weather report sheets at the end of this pdf! Make sure to print double sided!) and a pencil/marker.Over time you will be able to forecast the weather too! You can track the weather from your home! Use your observation skills and the tools below! Keep your eye out for other Discovery at Home tools you can add to your weather station. Weather data over decades gives us information about a place’s climate. Meteorologists track weather over multiple days to make the best forecasts.
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