The answer to the riddle "What is black when it's clean and white when it's dirty?" is a chalkboard. When a chalkboard is clean, it appears black; however, when you write on it with white chalk, it becomes "dirty" and takes on a white appearance.
Blackboard
If you drop soap on the ground, the soap is dirty AND the floor is clean.
Pretty much no difference, but some people believe that dirty is not that clean and filthy is EXTREMELY dirty.
It means you just clean the dirty spot, not the whole garment.
as a responsible child i will clean my class room whenever it is dirty.
Blackboard
A chalkboard is black when clean and dirty when written on with white chalk.
A blackboard
Blackboard
A black car.A black dog.Black clothes.A Panther.
A blackboard.
A chalkboard ~_~
A chalkboard ~_~
blond, dark, fair, auburn, dirty, clean, black
A chalkboard ~_~
No
it is dirty