SCIENCE FROM JUNK - MAKE THE FLOATING WATER

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ANTI GRAVITY EXPERIMENT

Water is heavy and it always flows down, but with a simple science trick you can make it float, supported by just a single playing card. Read on to find out how and why the water defies the gravity.

WHAT YOU WILL NEED:
Clear cup with a little water
Playing card



INSTRUCTIONS:

1. Fill your cup about half full of water.
2. Pour the water from the cup into the sink and observe what happens. (You will see that the water pours out, no surprise!)
3. Now, refill your cup to about half full again. Place the playing card over the cup, covering the top of the cup completely.
4. Hold the card in place and carefully turn the cup over. Keep your hand on the card for a few moments, then remove your hand.

You will see that when your hand is removed from the base of the card it will stay in place and continue to hold the water inside the cup, surprise!

SCIENCE BEHIND:
In the first part of the experiment, the force of GRAVITY pulled the water from the cup into the sink. Gravity will pull all things towards the earth. The only way to prevent gravity from pulling something towards the earth is to find another force to act against it. The force that keeps the card and water INSIDE the cup is called AIR PRESSURE. The air below the cup is actually pushing up on the card. The upward force of air pressure against the card is enough to cancel out the effect of gravity on the water inside the cup. This allows the water to “float” inside the cup, defying the gravity.

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