Mini Project

So Kimberly Arciaga and myself were thinking..."What would be a simple but fun experiment to do?" and we thought of the best one!!!! The "Cup, Water, and Index Card "experiment.

What you need:
-plastic cup
-sink
-index card

Instructions: fill cup with water until it is almost full, put the index card over the cup, turn over the cup (while holding the card in place), then let go of the card.

The card doesn't fall?! how wierd!!!!!!!!!

Explanation:
In the "Cup, Water, and Index Card" experiment, the water can't escape until the card is out of the way, but for the card to move, the air inside the glass has to get bigger. The pressure of air outside the glass pushing up on the card keeps it in place.