12 



FIRST YEAR SCIENCE 



and the earth were placed at its center with the moon as 

 far away as it now is, there would be almost as great a 

 distance between the moon and the sun's surface as there 

 is between the moon and the earth. A good way to get 

 an idea of the relative size of these bodies is to let a pencil 

 dot represent the moon, a circle an eighth of an inch in 



SURFACE OF THE MOON. 

 Showing the great crater-like depressions. 



diameter the earth, and a circle with a diameter of a little 

 more than thirteen and one half inches the sun. 



Both the sun and the moon are of the greatest interest 

 to us, as they have much to do with our existence. If it 

 were not for the sun, we should have almost no heat or 

 light on the earth, and life could not exist. If the sun 

 were much nearer, it would be too hot for life as we know 

 it, and if much farther away, too cold. If it were not for 

 the moon, the beauty and variety of our nights would be 



