calorifier (kÉËlÉrÉªËfaÉªÉ). 1  a water tank fitted with a coil, or coils, that can be heated in order to heat the water â â  The pressurised water supply is cold only: a calorifier is available at extra cost. Usage examples. 2  Trends. 3  a water tank fitted with a coil, or coils, that can be heated in order to heat the water â â  The pressurised water supply is cold only: a calorifier is available at extra cost.
In ecology, a population consists of all the organisms of a particular species living in a given area. For instance, we could say that a population of humans lives in New York City, and that another population of humans lives in Gross.
Population distribution: the way in which a population is spread over an area. This usually requires a description. Population density: the number of people per specified area, for example, population per kilometre squared. This will be a figure, for example, 78 people/km 2.It is very common for the examiners to question you on your knowledge of population distribution at a global or national scale.opulation density: the number of people per specified area, for example, population per kilometre squared. This will be a figure, for example, 78 people/km 2. It is very common for the examiners to question you on your knowledge of population distribution at a global or national scale.