Air Pressure part 2
H ere is part two in our science experiment line. Sneaky Bottles Poke a balloon into a water bottle and stretch the balloon's neck to cover the bottle from the inside. Put your mouth to the bottle and try to inflate the balloon! What's going on? You're trying to expand a balloon, but when you do this in a closed container, space becomes a problem. There's nowhere for the air already inside the bottle to go when the balloon gets larger. Using your tack, poke several small holes in the bottom of the plastic water bottle. Now try to inflate the balloon. In the bottle with the hole, air is allowed to leak out, this making more room for the balloon to inflate. Try not to burst a blood vessel in your forehead when you do this one!