186 NATURE-STUDY LESSONS. 



5. Repeat this exercise with the moon next month, 

 and, if necessary, the succeeding month, until you can 

 answer such questions as : 



(«) Which way is the moon moving? 



(J>) How many days does it take to go round the 



earth ? 

 (c) It is II a.m.; point to where the moon is now. 

 {d) Point to where the moon will be seen next 



Saturday evening at 9 o'clock. 

 {e) Make a drawing of the part of the moon that 



will be visible next Monday evening. 

 (J) On what day will exactly the west half of the 



hemisphere of the moon towards the earth be 



visible, and at what time of that day will it be 



most nearly over our heads ? 

 {g) From month to month, does the moon move 



near the same stars? 



6. What are the positions of the sun and moon with 

 reference to the earth at the following times : — 



(a) When the moon is first visible in the west in the 



evening ? 



(b) When the moon looks like a half circle ? 



(c) When the moon looks like a circle ? 



(ji) When the moon is once more a slender crescent } 



7. How many days elapse between the time the moon 



becomes invisible in the morning until it can be seen 



again in the evening? 



The changing appearances of the moon from n. slender crescent in the 

 west to a circle, and from a circle to a slender crescent, are t\is phases ot \h.e 

 moon. 



From the time of new moon until half of the illuminated part is visible, 

 it is in its first quarter. 



From the time of its first quarter to full moon, it is in its second quarter. 



