Atmosphere of Earth trend begin above 11 km, where the temperature stabilizes through a large vertical distance through the rest of the troposphere. In the stratosphere, starting above about 20 km, the temperature increases with height, due to heating within the ozone layer caused by capture of significant ultraviolet radiation from the Sun by the dioxygen and ozone gas in this region. Still another region of increasing temperature with altitude occurs at very high altitudes, in the aptly-named thermosphere above 90 km. Because in an ideal gas of constant composition the speed of sound depends only on temperature and not on the gas
The Mask of the Sun simple animations. "Softline" in 1983 noted the "innovative" animation and "excellent, detailed" graphics, and called the puzzles "very good". The magazine concluding that ""The Mask of the Sun" is a very good graphics adventure for the average to good adventurer". "Ahoy!" in 1984 liked "Mask of the Sun"s graphics and vocabulary but noted long load times and low level of difficulty, stating that even novice adventurers would be able to finish the game "within a couple of weeks". "Antic" called "Mask of the Sun"s graphics "absolutely superb" and the gameplay as "excellent". A sequel to The Mask of the Sun