To take in. Many things absorb water. One of the principal pollutants arising from mining operations. Acid water forms when water contacts certain types of exposed mine wastes and ores. A chemical compound which dissolves in water.
Acids have sour taste and turn a vegetable dye called litmus, red.
An acid separates into two or more electrically charged parts when it is dissolved in water. Also abbreviated as ac-ft. An expression of water quantity. One acre-foot will cover one acre of ground one foot deep. A space heating system in which heat from the sun is absorbed by collectors and transferred by pumps or fans to a storage unit for later use or to the house interior directly.