Q. Why does more rain fall at the equator than at the poles?
A. Because the contrast between the night and day is very great. The hot air absorbs moisture very abundantly during the day; and when the cold night condenses the air, it is unable to retain the moisture imbibed, and some of it falls in rain.
CHAPTER XXV.
WATER.
Q. What is water?
A. Water is composed of two gases, oxygen and hydrogen.
(In 9 lbs. of water, 8 are oxygen, and 1 is hydrogen.)
Q. Why is water fluid?
A. Because its particles are kept separate by latent heat; but when a certain quantity of this latent heat is driven out, water becomes solid, and is called ice.