Question

At places, the groundwater is stored between layers of hard rock below the water table. This is known as ______.
A.A reservoir
B.An aquifer
C.A hard water
D.A well water

Answer 1

Hint:To answer this question, you must recall the various layers that store groundwater under the surface of earth. Groundwater is the water that enters the soil below the earth’s surface and gets deposited as a source of water in the empty spaces.

Complete answer:
The Earth’s water, in all forms, solid liquid and gas is enclosed by a layer of the atmosphere known as the hydrosphere. It stretches from below the surface of earth upwards till about 7 miles into the atmosphere, a few miles above the lithosphere. Majority of the water on the earth is present in the oceans and seas, ice caps, glaciers, rivers, as groundwater and in the atmosphere.
Most of this water, however, is not fit for human consumption and use. The suitable water is the freshwater. One of the most commonly used sources of freshwater is groundwater in the form of wells and aquifers.
An aquifer is a rock body or rock sediment made up of porous rocks which is filled with groundwater. Groundwater makes its way into the aquifer as the water from precipitation passes through the layers of the soil deeper into the surface of earth. An aquifer can also be termed as the water bearing layer or zone below the water table.

Thus, the correct answer is B.

Note:
An aquifer can be of two types namely confined aquifer and unconfined aquifer. Confined aquifers are those which have a layer of impermeable rock present above them while unconfined aquifers have a layer of penetrable soil above them.