1 00:00:00,520 --> 00:00:03,840 Speaker 1: Welcome to brain Stuff from house stuffworks dot com, where 2 00:00:03,840 --> 00:00:14,560 Speaker 1: smart happens. I am Mars Brain with today's question, why 3 00:00:14,640 --> 00:00:19,759 Speaker 1: is a popsicle called a quiescently frozen confection? Popsicles have 4 00:00:19,840 --> 00:00:23,040 Speaker 1: been around for nearly a hundred years. Ever since a 5 00:00:23,160 --> 00:00:26,360 Speaker 1: cold night in nine five, when eleven year old Frank 6 00:00:26,440 --> 00:00:29,240 Speaker 1: Epperson left a cup of soda pop with a stirring 7 00:00:29,320 --> 00:00:32,640 Speaker 1: stick in it outside, popsicles have been a cool and 8 00:00:32,720 --> 00:00:36,360 Speaker 1: flavorful treat for young and old al While the trademark 9 00:00:36,479 --> 00:00:40,199 Speaker 1: Popsicle brand is the most popular, the industry sells more 10 00:00:40,240 --> 00:00:43,280 Speaker 1: than a billion of the variously flavored ice on his 11 00:00:43,440 --> 00:00:46,880 Speaker 1: Stick treats every year, and the vast majority of them 12 00:00:46,920 --> 00:00:51,440 Speaker 1: are quiescently frozen. This phrase actually refers to the fact 13 00:00:51,479 --> 00:00:55,240 Speaker 1: that flavored ice is simply put in a refrigerator and frozen. 14 00:00:55,640 --> 00:01:00,480 Speaker 1: The word quiescently means in a RESTful state. This distinction 15 00:01:00,600 --> 00:01:04,080 Speaker 1: is made because ice cream and most other frozen confections 16 00:01:04,080 --> 00:01:08,320 Speaker 1: are stirred or agitated in the process known as overrunning. 17 00:01:08,760 --> 00:01:12,520 Speaker 1: For example, overrunning is what causes the ice cream mixture 18 00:01:12,560 --> 00:01:16,520 Speaker 1: to expand as it slowly freezes, by creating little bubbles 19 00:01:16,520 --> 00:01:20,720 Speaker 1: of air in the mixture. It requires constant agitation until 20 00:01:20,760 --> 00:01:25,279 Speaker 1: the confection is ready Quiescently frozen mixtures are not stirred 21 00:01:25,360 --> 00:01:29,200 Speaker 1: or agitated at all after the mixture is prepared. If 22 00:01:29,240 --> 00:01:31,800 Speaker 1: you've ever tried to make flavored ice at home, you 23 00:01:31,840 --> 00:01:35,440 Speaker 1: may have noticed that the flavor does not distribute evenly. 24 00:01:35,959 --> 00:01:38,800 Speaker 1: Often you have an ice cube with a confection of 25 00:01:38,840 --> 00:01:42,360 Speaker 1: flavor at the bottom. In the case of flavored ice, 26 00:01:42,600 --> 00:01:45,679 Speaker 1: the water freezes at thirty two degrees fahrenheit or zero 27 00:01:45,720 --> 00:01:48,840 Speaker 1: degrees celsius, while most of the other ingredients have a 28 00:01:48,920 --> 00:01:53,920 Speaker 1: lower freezing temperature. Commercial vendors of flavored ice use stabilizing 29 00:01:54,080 --> 00:01:57,560 Speaker 1: ingredients that keep the syrup, flavoring, and other ingredients from 30 00:01:57,600 --> 00:02:01,360 Speaker 1: separating from the ice as it forms. Instead, these other 31 00:02:01,520 --> 00:02:05,080 Speaker 1: ingredients become a sort of semi frozen lubricant between the 32 00:02:05,120 --> 00:02:11,880 Speaker 1: ice crystals, giving popsicles their slushy consistency. Be sure to 33 00:02:11,960 --> 00:02:14,720 Speaker 1: check out our new video podcast, Stuff from the Future. 34 00:02:15,040 --> 00:02:17,359 Speaker 1: Join How Stuff Work staff as we explore the most 35 00:02:17,360 --> 00:02:22,440 Speaker 1: promising and perplexing possibilities of tomorrow. The How Stuff Works 36 00:02:22,520 --> 00:02:25,760 Speaker 1: I Fine app has arrived. Download it today on iTunes.