Words that start with S

A screwdriver is used for tightening and loosening screws. Screws are threaded so that they are less likely to pull out once they have been tightened, unlike nails. Screws come with different shaped holes in the top, and the ends of screwdrivers come in the same shapes. The commonest ones are flathead or slotted head, and phillips head (cross shaped).

A shell is the hard outside coating found on many animals. Snails have shells that form a spiral that was built up as the snail grew bigger. crabs and turtles have a hard shell that perfectly fits the animal inside. Most animals that have shells can hide inside them if they are scared.

Your skeleton is made up of a number of bones, which hold you up. Your bones are connected to each other by joints, such as your knee and elbow, which let you move around.

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.

You are surprised when something happens suddenly that you did not expect. When you open a present and you don't know what is inside, it is a good surprise. The person in the picture is surprised.