WAEC - Physics (1990 - No. 60)
What is the difference between a crystalline and an amorphous solid? A crystalline solid
has cubic structure while amorphous solid has hexagonal structure
has regularly-repeating pattern while an amorphous solid has not
is white while amorphous solid is yellow
is always hard while amorphous solid is always soft
melts on heating while an amorphous solid sublimates on heating.