alleryWhat name is given to particularly old groundwater?
ASoft water
BFossil water
CGrey water
DRain water
Answer & Solution
Correct answer: B. Fossil water
1. Some groundwater stays underground for thousands of years.
2. The very old kind is called fossil water.
3. Soft water, grey water and rain water describe hardness, use and origin, not age.
_Source: Wikipedia, Water cycle, Residence times_
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