Multiple choice

Water from an artesian well flows up automatically due to

  1. heavy rainfall in the region

  2. volcanic activity

  3. hydrostatic pressure

  4. geothermal energy

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An artesian well flows automatically because water is confined between impermeable layers at pressure. When the well is drilled, hydrostatic pressure forces water up without pumping, sometimes even above ground level. Heavy rainfall, volcanic activity, and geothermal energy are not the primary mechanisms for artesian flow.