Name the property depending on which an object sinks in or floats on water.
Name the deep holes that are dug into the ground to bring underground water to the surface.
Name the tanks with steps on all its sides that were constructed to collect and store rainwater in ancient times.
What is watering of fields by artificial means called?
Name the wells which were dug on the roadsides or highways by kings or charitable organizations for long distance travellers in earlier times.
