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
Term sheet be a dangerous document unless it specifies very clearly, as it should, which portions are meant to be binding and which merely guide the discussion and drafting. Some portions of a term sheet can have binding effect, of course, if and to the extent an interlocutory memorialization is needed of some binding promises, that is, confidentiality of the disclosures made in the negotiation. The summary format of a term sheet, however, makes it less likely that any party will be misled into thinking that some form of enforceable agreement has been memorialized when it has not. Some important terms to