the water table
True. The water table is the level below the Earth's surface that is saturated with water and represents the upper surface of the groundwater in an area. It is mostly found underground and fluctuates depending on factors such as precipitation and seasonality.
An aquifer is an underground accumulation of water.
sewerage
A geyser is a vent that erupts water and steam. There are also underground lakes and aquifers.
They are called Artesian Wells where underground water under positive pressure causes the water level in the well to rise to a point where hydrostatic equilibrium has been reached. If the water reaches ground level they are call flowing artesian wells; some my look like fountains.
they call it that because it was underground and its was a rail road
Geologists refer to underground water as groundwater. Groundwater is water that is found beneath the Earth's surface in soil pores and rock formations, and it is a vital natural resource for drinking water and irrigation.
Americans call them 'The Subway', the British call them 'The Underground' or 'The Tube'.
If it is below the water table, it is an aquifer. Otherwise I think it is just called an underground resevoir.
We call it droples droples is inncorrect. it is call the hydrosphere.
This is called meniscus.
Underground railways are known, in the USA, as the subway.