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.
Living EnvironmentâJune â13 [12] Base your answers to questions 48 and 49 on the graph below and on your knowledge of biology. The graphshows the size of a population over time.48 State one reason for the changes in population size represented by line between years 5 and 10.