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
Sheet cake sprinkles and chocolate chips. By definition, they are made from a single continuous piece of cake. Ingredients such as nuts, chocolate chips, or coconut may be sprinkled over the top. A layer cake may be made from a sheet cake that has been split, filled with jam or icing, and frosted. A US commercial sheet cake pan is 18x24x2 or 18x26x2 inches in size. In the UK, Canada, and Australia a similar cake is referred to as a slab cake. Sheet cake A sheet cake is a cake baked in a large, flat rectangular pan such as a sheet pan