You know this is a ball because of the round shape it has.
You know that this other is an ice cube because it has its shape.
You know this is an ice cream cone by the way you know so well.
By its shape you can distinguish a teddy bear from a feather duster.
But, Do you know that the earth, the rocks, salt crystals and water droplets, snowflakes and stone needles also have their own similar shapes, sometimes, to those of objects of common use?
On the following pages you will see the special shapes that some things have.