U. 1. L.3-4 ( 3 rd year ) Industrial School

U. 1. L.3-4 ( 3 rd year ) Industrial School

(a) The windsurf board is made of plastic foam, which is impossible to sink.

(b) The mast and boom are constructed from aluminium, because it is light and strong.

(c) The sail is made of polyester, which cannot be torn but bends easily.

(d) The ropes are made of nylon, which is impossible to stretch and difficult to cut.

Fibreglass is used for making boat hulls because it is tough.

- Fibreglass is used for making boat hulls because of its toughness.

- Glass is used for making windows because it is transparent.                        (because of)

- Glass is used for making windows because of its transparency.