A group of students are wandering around a room. When their teacher claps, the students sit down wherever they are. This situation best models the formation of which type of solid?
The students sitting down immediately are like atoms suddenly freezing in place with no chance to get into rrder before solidifying. So the students/atoms are scattered about with gaps between them and no orderly pattern.
If the students were given time to get to their desjs, producing a nore orderly arranhement, that corresponds to atoms having more time to settle into a more orderly pattern. Then you would be simulating a crystalline solid.