The chert, a fine grained sedimentary rock, was found in the region of Rohri in Pakistan. It was used by the Harappans for making stone blades and tools.

Kalibangan, Lothal, Rakhi Garhi and Dholavira are the Indian sites.

A costal landscape caused by sand dunes. These soils may have originated in the Pleistocene epoch of the Quaternary period.

Narmada, Godavari, Krishna, Yamuna and other river valleys.

The industries of Palaeolithic cultures are divided into the Early, Middle and Late Acheulian Industries.

The classification of these cultures is done on the basis of stratigraphic, chronological and lithic (stone tool) evidence.

Neolithic age is the age in which animal and plant domestication developed, leading to food production.

The period before the invention of script is broadly divided into Stone Age, Bronze Age and Iron Age.

Invasions, floods and shifting of the river course are also cited as reasons for the ruin of Indus civilisation.

The Great Bath is a tank situated within a courtyard. The corridors were present on all four sides and stairs are seen on the northern and southern sides. It was well paved with several adjacent rooms.

Harappan culture is divided into various phases:
1. Early Harappan 3000-2600 BCE
2. Mature Harappan 2600-1900 BCE
3. Late Harappan 1900-1700 BCE.

1. The date of the Mesolithic culture varies in different parts of the world.
2. This culture is assigned to pre-agricultural times in certain areas.

1. It is the only existing fossil find of human ancestors in India.
2. The only well-known hominin fossil of India was found at Hathnora near Hoshangabad in Madhya Pradesh.

Palaeolithic period is divided into
1. Lower Palaeolithic culture
2. Middle Palaeolithic culture
3. Upper Palaeolithic culture.

The source for the study of pre-historic period include archaeological sites, geological sediments, animal bones and fossils, stone tools, bone tools, rock paintings and artefacts.