MR. G AND THE GREAT PENNY DILEMA

PROBLEM: What happens when you place water on pennies?

MATERIALS: Pennies, Water, Pipette (eyedropper), Plates

HYPOTHESIS: 
A. The water drops form tiny balls that roll off the penny. (5)
B. The water starts to change the color of the penny. (2)
C. The water drops form tiny balls that stay on the penny. (2)
D. The water drops spread and cover the whole penny. (8)

PROCEDURE: Fill up a water bottle. Put your penny on the plate. Take an eyedropper and squeeze some water into it. Then slowly squeeze a few drops of water on to a penny.  Be careful.  Don't touch the penny or the plate! 
Watch closely! 

CONCLUSION: The water drops formed tiny balls that stayed on the penny!  Some of us could get up to 25 drops on the penny before the water spilled over!

Check out this other cool experiment you could try at home.  Fill a jar with water.  Place a screen over the top.  Flip it over. What happens?  The water doesn't spill because the surface tension is too great and the water can't it through the holes. So cool!  If you tilt the jar just a little the pressure is too much and the water spills.

"It's not magic, it's SCIENCE!"