This process is called sublimation. The opposite (deposition) is where a gas turns directly into a solid. Sublimation occurs if the pressure and temperature are right for the specific substance, so that the solid phase in a phase diagram borders the gas phase.
Most cicadas go through a life cycle that lasts from two to five years. Some species have much longer life cycles, such as the North American genus, Magicicada, which has a number of distinct broods that go through either a 17-year or, in some parts of the world, a 13-year life cycle.
It depends on which genus of cicadas they are. Most of the North American species are in the genus Tibicen: the annual or dog-day cicadas (so named because they emerge in late July and August [1]). Which come out every year.The best-known North American genus is Magicicada, however.These periodical cicadas have an extremely long life cycle of 13 to 17 years and emerge in large numbers. xyzzy Â· 5 years ago.est Answer: They came out every 17 years or so. But you have some that come out alternately. Like how people give birth every year insects come out in intervals to one another at the same time.