Definitions - k

K Value

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.

Search the Web for K Value

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.

Search the Web for K-Selection

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

Search the Web for Kapok
Katabatic Wind

Search the Web for Katabatic Wind

Underwater forests of tall brown algae that grow in cool coastal waters.

Search the Web for Kelp
Kerbside Recycling System

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.

Search the Web for Kerbside Recycling System
Kettle Hole

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

Search the Web for Kettle Hole

Search the Web for Kilowatt-Hour
Kyoto Protocol

Search the Web for Kyoto Protocol

Click on a letter to see all the terms and definitions that begin with that letter.

A free Android app containing all these definitions is now available, called the Green Dictionary. Click here to see the entry on the Android market; or click here if on an Android phone.