What is the meaning / definition of Yield Management in the hospitality industry? Simply put, the purpose of Yield Management (aka Revenue Management) is to achieve maximum revenue/profit. To do this, a yield management strategy needs to be both reflective and forward-looking.
Scientists call the ionosphere an extension of the thermosphere. So technically, the ionosphere is not another atmospheric layer. The ionosphere represents less than 0.1% of the total mass of the Earth's atmosphere.
In this region of the atmosphere the Sun's energy is so strong that it breaks apart molecules and atoms of air, leaving ions (atoms with missing electrons) and free-floating electrons. The ionosphere is the region of the atmosphere where the aurorae occur.