I would say sawdust is a solid because it is wood that has just been chopped and wood is a solid and just cause its been chopped doesn't mean it still isn't a solid!!!!!! and it certainly isn't...
solid
A solid is not a solid when you change the shape and becomes different.
A piece of butter is a solid in solid.
a solid is a solid because the molecules that are in the object are closely compact with each other. they do not move but the do vibrate.