Cloud the bottom of the hierarchy. Clouds in the troposphere assume five physical forms based on structure and process of formation. These forms are commonly used for the purpose of satellite analysis. They are given below in approximate ascending order of instability or convective activity. "Non-convective" stratiform clouds appear in "stable" airmass conditions and, in general, have flat sheet-like structures that can form at any altitude in the troposphere. The stratiform group is divided by altitude range into the genera cirrostratus (high-level), altostratus (mid-level), stratus (low-level), and nimbostratus (multi-level). Fog is commonly considered a surface-based cloud layer. The fog may form
So Beautiful or So What Love Song", contained a chord progression he found particularly interesting. After coming to this realization, he focused on the album’s three ballads, "Questions for the Angels", "Amulet", and "Love and Hard Times". Unlike his previous rhythm-based albums, in which he would gain inspiration for his guitar parts from pre-recorded backing tracks, Simon took a more traditional approach to building the songs on "So Beautiful or So What". He wrote songs at home before developing them further in the studio with the help of a natural click track, such as "a percussion instrument, or even just tapping out a rhythm on