Definitions - k

The comparison of thermal conductivity can be measured by the 'k' value. The k value, or Thermal Conductivity, specifies the rate of heat transfer in any homogeneous material. If a material has a k value of 1, it means a 1m cube of material will transfer heat at a rate of 1 watt for every degree of temperature difference between opposite faces. The k value is expressed as 1 W/mK. The lower this value is, the less heat the material will transfer.

Species in stable environments tend to live longer and produce fewer, and sometimes larger, offspring. (K is the constant for carrying capacity in terms of population growth.) This used to be true for whales before their environment was changed. See R-Selection.

Kapok trees produce a fluffy fiber in their seed pods. The kapok fiber is a substitute for down.

Any wind blowing downslope. Usually cold.

The biophysical environment is the symbiosis between the physical environment and the biological life forms within the environment, and includes all variables that comprise the Earth's biosphere.

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Where people sort out their recyclable waste, either into a box, bag or separate bin, and this is then collected from people's houses, like the ordinary waste collection.

Depression or pond found in glacial deposits (see Kame Terrace). Left by a chunk of melted glacier.

Energy obtained from sources that are essentially inexhaustible, unlike, for example, the fossil fuels, of which there is a finite supply. Renewable sources of energy include wood, waste, geothermal, wind, photovoltaic, and solar thermal energy.