A spiral is a curve that you make by drawing around a central dot while at the same time getting further and further away from the dot.
A spire is a tall, pointed structure usually found as a type of roof on the tallest part of a grand building. Spires are common on churches and cathedrals.
Sis forSpirit level
A spirit level, or bubble level is a tool that is used to tell if something is horizontal or vertical. Spirit levels have one or more small tubes filled with liquid in them, with a bubble of air in the liquid. When the bubble is in the centre of the liquid, the spirit level is straight.
Sis forSpoke (Wheel)
A modern day sponge is made from a kind of plastic that has been filled with bubbles while it is still liquid. The result is that sponges are soft and full of small holes. Sponges are great for cleaning things with, and because of the holes they are very good at soaking up spilled liquids.
Before modern sponges were invented, people used to use sea sponge skeletons as cleaning sponges.



















