|
You won't quench anybody's thirst with this one! Dare yourfriends to drink water from a
jar through a straw and watch them suck themselves silly while the water refuses to rise.
What you need:
- Glass jar (An empty pickle or jelly jar works well)
- Hammer and nail
- Drinking Straw (Plastic works best)
- Modelling clay
- Water
What to do:
Have a grown-up help you make a hole big enough for the straw in the metal jar lid
using the hammer and nail. (Or a drill if your dad's the handy type.) Fill the jar about halfway
with water and put the cap on. Stick the straw in the water through the hole in the cap and plug it
up tight with the clay so that no air can get in. Now, bet your friend that he/she won't be able to
drink the water in the jar through the straw. Watch how frustrated they get when the water doesn't
budge!
Why this happens:
Usually when you use a straw to drink water from an open glass, air pressure makes the
water travel up the straw. In this case, since you've sealed the lid, you've blocked the air
pressure and the water can't rise. No matter how big a sucker you are, you can't get a sip out of
this one.
|
