Sky Study 923 



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 moonrise on two successive nights ? 



1 1 . Do you think we always look at the same side of the moon ? If so, 

 why? 



12. Is 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 ? 



1 5 . How many times does the moon go around the earth in a year ? 



1 6. 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. 



The Physical Geography of the Moon 



Questions for the pupils to think about and answer if they can 17. Since 

 it has been proved that there is no air or water on the moon, could there be 

 any life there ? 



18. Supposing you could do without air or water and should be able to 

 visit the moon, what would you find to be the color of the sky there? 



19. Would there be a red glow before sunrise or beautiful colors at 

 sunset ? 



20. Would the sun appear to have rays? Could you look at the sun 

 without being blinded ? 



2 1 . Would the stars appear to twinkle ? Could you see the stars in the 

 daytime ? 



2 2 . How would the shadows look ? If you could step into the shadow 

 of a rock at midday, could you be seen? 



23 . Could you tell by looking at it whether a mountain was far or near? 



24. It is estimated that the temperature of outer space is 250 degrees 

 below zero, and the sun's direct heat is 500 degrees above zero. If this be 

 correct, how hot would it be in the sunshine on the moon? How cold 

 would it be at midnight? 



25. Why is it so much hotter and colder on the moon than upon the 

 earth ? 



26. If you could shout on the moon, how would it sound? If one 

 hundred cannons should be fired at once on the moon, how would it sound ? 



27. Is there any rain or snow on th? moon? Are there any clouds 

 there? If there are no air and water on the moon, would the intense heat 

 and the powerful cold affect the soils or rocks, as freezing and thawing affect 

 our rocks ? 



28. Professor Newton estimated that the earth meets seven million 

 meteorites (shooting stars) every twenty-four hours. Why do we not see 

 more of these? What happens when a meteorite strikes the moon? 



29. The moon is so small that the force of gravity on its surface is one- 

 sixth that on the earth's surface. If a man can carry seventy-five pounds 

 on his back here, how much could he carry on the moon? If a boy can 

 throw a ball one hundred yards here, how many yards could he throw on the 

 moon ? If a boy can kick a football one hundred and thirty-five feet in the 

 air here, how far could he kick it on the moon? 



