Question

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?
an amorphous solid because the particles do not have a regular structure
an amorphous solid because the motion of the particles stopped
a crystalline solid because the moving particles lock into fixed positions
a crystalline solid because the particles have a long-range order

Answer 1

an amorphous solid because the particles do not have a regular structure

Explanation: the students freeze randomly wherever they happen to be, producing no regular, repeating arrangement — like atoms in an amorphous solid (e.g., glass). Stopping motion alone doesn’t distinguish amorphous vs. crystalline; crystalline solids require long-range order.