Heat 121 



172. When you have put liquid shoe polish on your shoes, your 



feet become cold as it dries. 



173. The part of an ice-cream freezer which holds the cream is 



usually made of metal, while that which goes outside and 

 contains the ice and salt is usually made of wood. 



174. The steam in a steam radiator rises from a boiler in the 



basement to the upper floors. 



175. When you throw a ball, it keeps going for a while after it 



leaves your hand. 



176. Clothes keep you warm, especially woolen clothes. 



177. The Leaning Tower of Pisa does not fall over. 



178. It is almost impossible to climb a greased pole. 



179. Heat goes up a poker that is held in a fire. 



1 80. A child can make a bicycle go rapidly without making his 



feet go any faster than if he were walking. 



