= dQ/T, since the Second Law defines the direction of a chemical or
Sensible heat Thermal energy that can be 'sensed' (e.g. with a thermometer) and which can be transferred into the air through conduction and convection, causing a change in temperature.
Sidereal day Time interval between the motion of a point across a specified meridian. Sinks Reservoirs occurring in nature in which certain materials can be stored as part of
the circulation of them through the global environment, e.g oceans are a primary sink for carbon.