DIY Barometer Weather Science Experiment
In this fun and easy science experiment, we’re going to explore and investigate weather by making a DIY barometer.
- Empty two liter soda bottle
- Plastic ruler
- Food coloring
- Cut the top off of the soda bottle.
- Place the ruler inside the bottle and tape it securely to the inside wall.
- Next, securely tape the length a tubing along the length of the ruler making sure to leave an extra few inches hanging outside the top of the bottle.
- Fill the bottle about halfway full with water.
- Add some food coloring to help see the water a little easier.
- Chew the gum so it gets soft and tacky.
- Now suck the water up through the tube until it is a couple inches above the water line and use your tongue over the end of the tubing to hold the water in place.
- Quickly place the gum over the end of the tubing to hold the water in place.
- Mark the water line of the water in the tubing on the outside of the bottle.
- Observe the water line in the tubing each day and mark any changes on the outside of the bottle.
- If the air pressure rises, the water level in the tubing will rise.
How it Works:
High air pressure is usually associated with mild weather and low air pressure is usually associated with bad weather. The barometer acts as a balance and balances the weight of the air (air pressure) around you against the water in the tube. If the air pressure is low, the water in the tube goes down. If the air pressure is high, the water in the tube will rise.
Make This A Science Project:
Observe your DIY barometer over several days and record weather conditions associated with high and low air pressure readings. Watch local weather reports and determine if your barometer aligns with meteorological reporting.