Teacher's Leaflet. 773 



which is turned toward us. The mountains, plains and so-called craters 

 are all named and mapped, and the height of the mountains and the 

 crater rims have been measured. They have also demonstrated that 

 there is no air or water on the moon. 



Lesson XXIIL 

 the appearance of the moon. 



Purpose. — To make the pupils familiar with the appearance and the 

 phases of the moon. 



Observations. — (i). Describe how the moon looks when it is full. 



(2). What do you think you see in the moon? 



(3). Describe the difference in appearance between the new moon 

 and the full moon and explain this difference. 



(4). Where does the new moon rise and where does it set? 



(5). When does it rise and when does it set? 



(6). Where and when does the full moon rise and where and when 

 does it set? 



(7). How does the old moon look? 



(8). Could the crescent moon which is seen in early evening be the 

 old moon instead of the new; and,. if not, why not? 



(9). When and where do we ordinarily see the old moon when it is 

 crescent shaped? 



(10). Does the moon rise earlier or later on succeeding nights? What 

 is approximately the difference in time of moon rise on two successive 

 nights ? 



(11). Do you think we always look at the same side of the moon ? If 

 so, why? 



(12). Is there more than one side of the moon luminous? Why? 



(13). How many days from one new moon until the next? 



(14). How long is the day on the moon and how long the night? 



(15). How many times does the moon go around the earth in a year? 



(16). What is the difference between the disappearance of the old 

 moon and an eclipse of the moon? In both cases the moon is hidden 

 from us. 



Facts for the Teacher. — The first thing that attracts the eye in the full moon 

 aside from its disc-shape and light is that the surface is dark in some places and 

 bright in others; many children conclude that these colors indicate land and water 

 or mountains and valleys, but these conclusions are wrong. The dark portions are 



