Thunderstorms are large, strong storms that usually include thunder and lightning. They are extremely common in New Hampshire on hot days during the summer. Although thunderstorms can be extremely dangerous, they provide a great opportunity to explore meteorology, ecology, physics, and chemistry with children.
When the temperature drops suddenly this can be a sign of a stormy weather. Often meteorologists (people that study the weather) use a tool called a barometer to measure this change. A barometer lets someone know the amount of pressure in the air. The lower the pressure the stormier the weather.
Use this activity from Scholastic.com to create your own barometer
: Build Your Own Weather Tool!
Use the materials and follow the directions below.
Materials
• Empty coffee can
• Empty half-gallon jug or carton
• Index card
• Pencil and pen
• Plastic straw
• Plastic wrap
• Rubber band
• Tape
Directions
Cover the top of the coffee can with plastic wrap.
Use a rubber band to secure the plastic in place. Make sure the plastic is pulled tight so that the can is airtight.
Tape the end of the straw to the middle of the plastic wrap so it lies horizontally across one side of the plastic wrap cover.
Place the empty half-gallon jug (or carton) next to the coffee can. Tape the index card to the jug so that the straw lines up approximately to the middle of the card. Use a pen to mark this point on the card, and label it with the date.
Experiment!
Let the barometer settle for a few hours before beginning your observations. Place the barometer inside, away from a window, since it is sensitive to temperature as well as pressure.
Take the barometer outside to start your observations. You'll be tracking changes in the position of the straw, which will be affected by changes to the plastic wrap: High pressure will make the plastic wrap cave in, making the straw rise. Low pressure will make the plastic wrap puff up, so the straw will fall.
Check the location of the straw three times a day — in the morning, at lunch, and at the end of the day. Using a pencil, mark the location of the straw on the index card with the date and time.
At the end of each day, determine if the average pressure reading for the day was falling, steady, or rising.
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Thunderstorms are large, strong storms that usually include thunder and lightning. They are extremely common in New Hampshire on hot days during the summer. Although thunderstorms can be extremely dangerous, they provide a great opportunity to explore meteorology, ecology, physics, and chemistry with children. 
Materials
