Amazing

The MOM Song

Water Bottle Trick: Air Pressure & Gravity

It's the ultimate prank using the simplest of props... a plastic soda bottle filled with water. Even though the words, "DO NOT OPEN" are printed on the bottle, people just can't resist the temptation.

What you need:
2 plastic soda bottles (1-liter size works well),
cap
permanent ink pen
thumb tack (push pin)

The Leak-Proof Bottle
Use the tack to poke a few holes on the side of the bottle close to the bottom. (Get an adult to help with this part!)

Put the bottle in a sink or bowl filled with water. Fill the bottle with water and keep the water running into the bottle as you screw on the cap.
Lift the bottle out of the sink being careful not to squeeze it. What happens?
Unscrew the cap and watch what happens.

The "Do Not Open" Bottle Trick
Start with a new plastic soda bottle (don't use the one from the previous experiment). Write “DO NOT OPEN!” with the permanent ink pen on the bottle.
Fill up the bottle as before.

Set the bottle on the kitchen counter (word-side out) where someone can see it as they pass by. Stay close enough to watch what happens. Eventually, someone is bound to ask about the bottle. Let them unscrew the cap and you'll witness science in action!The science:The science of it is simple with gravity and air pressure acting on the water only once the bottle is opened. Gravity is pushing downward. However, when the lid is on the gravity cannot push on the water surface only the lid. It does push against the outside of the bottle on all sides.Since the outside atmospheric pressure is greater than the force of gravity, most of the water stays in the bottle. Once the lid is removed, gravity and atmospheric pressure will act at the same time on the water surface. The water will leak out. Scientific proof was never so much fun.

Good Grandpa.

A woman is in a grocery store and happens upon a grandpa and his poorly behaving three-year-old grandson at every turn. It's obvious Gramps has his hands full with the kid screaming for candy in the candy aisle, cookies in the cookie aisle; same for fruit, cereal and
soda.

Meanwhile, Gramps is working his way around, saying in a controlled voice, "Easy, Albert, we won't be long -- easy, boy."

Another outburst, and she hears Gramps calmly say, "It's okay, Albert, just a couple more minutes and we'll be outta here -- hang in there."

At the checkout, the little terror is throwing items out of the cart, andGramps again in a controlled voice is saying, "Albert, Albert, relax buddy, don't get upset. We'll be home in five minutes; stay cool, Albert."

Very impressed, the woman goes outside where Gramps is loading his groceries and the boy into the car. "You know, sir, it's none of my business, but you were amazing in there. I don't know how you did it. That whole time, you kept your composure, and no matter how loud and disruptive he got, you just calmly> kept saying things would be okay. Albert is very lucky to have you for his grandpa."

"Thanks, lady," said Gramps, "But I'm Albert -- the little bastard's name is Stevie."