COMPLETE ONE WEATHER WISE EXPERIMENT TO EARN YOUR
SCIENCE FUN FOR EVERYONE: WEATHER WISE BADGE
HOW DO YOU MAKE A BAROMETER?
Empty two liter soda bottle
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.