Experiment of December 22, 2018:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

Experiment:

Question:

What stain patterns does Mr. Santa observe when dripping coffee or tea?

A) In certain directions, radial, darker rays form towards the outside.

B) Darker inside, lighter outside

C) Light inside, darker edge all the way outside

D) Uniformly colored everywhere