David Koble, age 9, of Bartlesville, Okla., for is question:

Why is a mountain cold on a hot day?

The heat of a summer day comes from the sun, whose radiant energy pours forth across some 93 million miles. The journey takes about eight minutes. On the .nay, this energy has no heat and no color. When it crashes into the earth, it shows its rainbow colors and some of it becomes heat. Some objects cause it to give forth more heat than others.

On a summer day, the land heats up faster than the watery sea. The hot land and the warm sea heat up the air nearest the earth. Higher up, the air remains cool. Higher still, the air is cold. For the filmy atmosphere does not capture the sun's heat. A tall mountain top is .nigh above the layer of atmosphere which is warmed by the land and the sea.