Bubbles won't freeze top-down because heat rises, ergo, the upper part of the bubbles should be warmer than the lower parts. If any Canadians or Scandinavians want to come up with your own experimental results, I will post the best photos or YouTube videos.
I'll give the answer on Wednesday, Jan 21. Please vote in the poll at left to choose the true answer and explain your thinking in the comments. The bottom half fell like a cup and dissoved into vapor before it could hit the ground. After that, the sunlight made the ice sublimate, opening up a hole on the top half of each bubble. They stayed in that state for about 30 seconds. Most of the bubbles popped right away, but a few froze hard and clear with a pattern of frostwork forming from the top down. The bubbles floated for a while and then popped, but they popped in slow motion, turning into droopy sacs or ashen wisps like shredded plastic bags, rather than a spray of droplets.ĥ.
There was no observable difference from the behavior of bubbles at subzero and normal temperatures.Ĥ. They drifted gradually downward, cracking or breaking silently when they touched the snowy ground.ģ. The bubbles turned opaque after about five seconds and froze into delicate white ice spheres. Some drifted out of sight and others popped as they touched the branches.Ģ. The warm air from my breath made the bubbles rise upward to the height of the treetops. Here at GJ Laboratories, we wondered what happens to soap bubbles in such extreme subfreezing temperatures.īefore reporting to you on the results of the experiment, let’s see if you can guess which of the following phenomena actually happened:ġ. The temperature plunged to 15 below zero Fahrenheit (-26C) yesterday morning.
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