"What happens to them all if we stand them aside in the liquid form for a time?""They all become solid again," replied Norah. "We proved that by melting the wax and the lead in the spoon. When they were taken away from the heat they became solid once more.""Notice how easily the piece of ice melts in front of the fire. I will catch the water as it drops from it in this saucer. Now if we stand this water aside, will it turn into ice again?""It will not turn into ice again here," said Norah. "It is not cold enough. But if we could put it into a very cold place it would become solid ice again. We should say that the water had frozen."SUMMARY
Ice is solid water. Heat will change this solid, like others, into liquid. Very little heat is wanted. Ice melts in the warm hand. The liquid water would become solid again in a cold place.
Lesson 18
Ice, Hail, and Snow
"I think we can find something more to say about ice," said Fred. "I seem to have learned ever so much from our last lesson.