Atmosphere of Earth (see the temperature section, below). Because the general pattern of the temperature/altitude profile is constant and measurable by means of instrumented balloon soundings, the temperature behavior provides a useful metric to distinguish atmospheric layers. In this way, Earth's atmosphere can be divided (called atmospheric stratification) into five main layers. Excluding the exosphere, the atmosphere has four primary layers, which are the troposphere, stratosphere, mesosphere, and thermosphere. From highest to lowest, the five main layers are: The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at
Harry Potter and the Deathly Hallows – Part 2 (video game) critics, though some critics found "Part 2" an improvement of "Part 1". Lowest ratings on Metacritic came from GamesRadar, stating, "This is the absolute nadir of the series. Harry Potter has finally devolved into a total cash-in and we can't score it low enough." GamingXP gave the Xbox 360 and PC versions positive reviews, saying "Where graphical aesthetics, thrilling atmosphere and a cinematic soundtrack celebrate their marriage, the gamer always wins." "The Escapist" gave it two-and-a-half stars out of five and said of the game, "The shooting mechanics and levels are getting better but the encounters themselves are too repetitive.