A compass is (a)____ instrument used for showing direction. It is made of a magnetic pointer (b)____ can move freely. The invetion of this instrument made it (c)____ easier for ships to nevigate before compasses, ships found (d)____ way by using stars. It is possible to make a very simple compass by rubing a needle (e)___ a piece of silk. this makes the needle magnetic. (f)____ you put the needle in a short straw and float (g)___ in some water, the needle (h) move so that it points to the north.