DIY Barometer

Good afternoon scientists! We are super excited to have built our own barometer! Try it today with your little scientist and help to unlock the joy of science. This is a great activity to explain why our weather changes over time. A Barometer is a scientific tool that measures the pressure of the air, High pressure is typically good weather, low pressure is typically bad weather (rain).

Materials

DIY Barometer (11)

Clean, Empty Glass Jar (We used a pasta sauce jar, you will not need the lid)

Balloon or Latex Glove

Straw

Scissors

Rubber Band

Super Glue (You could use School Glue but it will take longer to set)

Cardboard Box

Tape

Printer Paper

Marker

Investigation

  1. Stretch your balloon across the top of your jar. Pull it as tight as you can and wrap a rubber band around the jar to hold the balloon tight. (If you use a latex glove cut off your over hang.)DIY Barometer (17)
  2. Cut your straw so that the end is a pointed tip (If you have a straw with a flexible end, cut this off first).DIY Barometer (21)
  3. **Adults Only if using super glue** Glue the end of the straw without the point to the center of your balloon. Hold steady until the glue has set.DIY Barometer (25)
  4. Tape your printer paper to the outside of your box so that the paper is about halfway up your barometer.we moved DIY Barometer (27)
  5. We moved our experiment outside for the rest. Using a ruler, carefully check the height of your pointed tip in centimeters (cm). Mark the measured height on your printer paper. This is your reference point. Label it R.DIY Barometer (28)
  6. Measure in cm’s and mark each centimeter above your Reference Point and below your reference point.img_9884
  7. Leave your barometer in the same location and keep track of the movements of your barometer over time.

Talking Points

In this investigation we made our own barometer. A barometer is a scientific tool that measures the pressure of the air, High pressure is typically good weather, low pressure is typically bad weather (rain). When the pressure of the air increases it will push down on the balloon causing the straw to move up. When the pressure of the air decreases the air will be lighter causing the balloon to move up and the straw to move down.

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