The phrase "ice cracks" means that the frozen water breaks into pieces or splits apart.
Sentences with «ice cracks»
In the short time I was there, I witnessed the extreme melting rate first hand as the sound of ice cracking was an instant background noise while painting. (treehugger.com)
This makes it possible to precisely measure the altitude of the ocean water which reaches the surface through ice cracks and openings. (sciencedaily.com)
In the spirit of the season, I'm relenting to offer those of you who aren't fans of city - sounds a link to nature's audio channels, this from the Western Soundscape Archive in the US, where, although you can't listen to the buffalo roam, you can hear the bark of arctic foxes or the relaxing sound of ice cracking on Timber Lake, Alaska. (slaw.ca)