Conversely, generation length has changed little and remains in the low 20s in less developed nations. An intergenerational rift in the nuclear family, between the parents and two or more of their children, is one of several possible dynamics of a dysfunctional family.
For mineral, see Quartz. The quart is a unit of volume (for either the imperial or United States customary units) equal to a quarter of a gallon (hence the name quart), two pints, or four cups. Since gallons of various sizes have historically been in use, quarts of various sizes have also existed; see gallon for further discussion.
Other measurements also relate to quarts. A quart consists of 2 pints, and each pint is 2 cups, or 16 ounces. Quarts are also smaller parts of a whole. One gallon equals 4 quarts, and half a gallon is 2 quarts. Since each quart is 32 fluid ounces, a gallon is the same as 128 fluid ounces. When converting to the metric system, a quart is just slightly smaller than a liter.