One can purchase 20 black crayons on Amazon by buying the black crayons in bulk as opposed to by the box which contains several different colors. One can also buy black crayons at Office Specialties.
why are raindrops different sizes?
You could melt different types of crayons to see which color melts faster. that would be categorized as chemistry
they are made with different binders
Cells are different shapes and sizes because they have different functions. The functions dictate the shapes and sizes.
The different use of binders.
Car batteries come in different sizes and weights.Car batteries come in different sizes and weights.Car batteries come in different sizes and weights.Car batteries come in different sizes and weights.
crayons = Malkreide (sing.) crayons = Farbkreide (sing.) crayons = Buntstifte (pl.) crayons = Wachsstifte (pl.)
They are different sizes to aid the blind/visually impaired
crayons - les crayons which means pencils. If coloured, they are crayons de couleur.
different colored crayons
A box of a dozen (12) average crayons weighs about 2.11644oz but, there are different size 'boxes' of crayons. The ones you get at a restaurant may have 4 or 5 crayons, then I think there are ones with 15 or 16. Then there are 21, 48, 64, 96, and 120 count boxes, to name a few.