Everyone (or most people) appreciate a cool science experiment on video.  None may be more famous than the coke and mentos guys that went viral a couple years back.  In this video they show 10 really cool science experiments that use water.  Here is the first:

1. Slow motion ball:

You need a thick liquid, preferably honey, a heavy ball, and a sphere shaped container. Place the heavy ball in the lower half of the sphere. Fill the lower half of the container with honey a little more than half.
If you use too little or too much, it will affect the motion of the ball.

Let’s check out all 10 experiments and see what the water does on page 2

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