excavation methods

The governing scientific concept is radiocarbon dating, which estimates the age of once-living material by measuring the remaining carbon-14 and comparing it with its known rate of radioactive decay. It can be applied to materials such as wood, seeds, charcoal and bone under suitable conditions. Option A is correct; map drawing records space, oral tradition transmits memories, and linguistic comparison studies language rather than directly dating remains.

The governing excavation principle is stratigraphy, the study of successive soil and cultural layers in a site. When layers are undisturbed, deeper deposits are generally earlier than those above them, allowing archaeologists to establish relative chronology and connect objects with their context. Option C is correct. Numismatics studies coins, epigraphy studies inscriptions, and anthropology studies humans and cultures more broadly.

The governing concept is excavation as a systematic archaeological method. Archaeologists remove soil carefully, record layers and recover buried artefacts, buildings and other traces of past human activity. This evidence helps reconstruct how people lived and used the site. Therefore, option C is correct. Building construction, land sale and mere soil removal are not the historical purposes of excavation.

Bangles made from shell, terracotta, faience, or metal are archaeological evidence of specialised ornament making in Harappan communities. Their production required suitable raw materials, shaping, finishing, and sometimes specialised skill. Therefore, option B is correct. Bangles do not provide direct evidence for shipbuilding, agricultural tools, or brick manufacture, although those were separate activities in the wider Harappan economy.

The site of Harappa was excavated in the early twentieth century and provided the evidence that led scholars to recognise a previously unknown Bronze Age urban civilisation. The wider civilisation was subsequently named after this site, following the archaeological convention of using a major type-site name. Therefore option B is correct. Dholavira, Lothal, and Kalibangan are important Harappan sites discovered or studied later, but they were not the site through which the civilisation was first identified.

The governing concept is archaeological excavation as a systematic method of recovering and studying material remains of the past. Archaeologists carefully remove layers of soil to record structures, artefacts, bones, tools, and other evidence in its spatial and chronological context. Therefore option A is correct. Construction, agricultural preparation, and changing a river are practical activities, not the scholarly purpose of excavation. Careful recording is essential because removing objects without context can destroy historical information.

The governing concept is preliminary archaeological survey and site planning. Before digging, archaeologists inspect and map the area, study visible features, consult earlier records, and may use surface finds or other methods to identify promising locations. This helps them plan excavation while preserving the site’s context. Therefore option A is correct. Removing all objects, constructing a building, or burning soil would destroy evidence rather than document it and are not legitimate preparation methods.

An archaeological survey is a systematic inspection of an area before or alongside excavation. Researchers look for pottery fragments, bricks, stone tools, mounds, walls and other remains visible on or near the surface. These clues help identify a possible site and suggest its extent and nature. Modern houses, living trees and road signs are not the archaeological remains being sought, so option A is correct.

The grid method divides an excavation area into measured squares or rectangles, usually marked with lines and coordinates. Archaeologists can then record the precise position, depth and layer of every object found. This makes the evidence spatially comparable and improves documentation. Irrigation, coin and transport methods do not describe the organised layout of an excavation, so option A is correct.

Stratigraphy is the study of the successive layers, or strata, formed at an archaeological site. By observing the position and relationship of layers, archaeologists establish a relative sequence: undisturbed lower deposits are generally earlier than those above them. Numismatics studies coins, anthropology studies humans and cultures, and geography studies places and spatial relationships, so option A is correct.

The principle of stratigraphy states that, in an undisturbed sequence, lower deposits were normally laid down before the deposits above them. Therefore, the lowest excavated layer is generally regarded as the oldest among the layers examined. This is a relative dating rule, not an absolute date, and disturbance can alter the sequence. The newest, modern and artificial choices do not express the usual principle, so option A is correct.

A trowel is a small, pointed hand tool used by archaeologists to loosen and remove soil with control. Its size allows careful work around walls, layers and partly exposed objects, reducing the risk of damage. A sword is a weapon, a loom is used for weaving, and a balance is used for weighing, not digging. Therefore, option A is the correct answer.

A soft brush is used after or during careful excavation to remove loose soil from around fragile objects such as beads, pottery or bones. Its gentle bristles reduce scratching, pressure and breakage while exposing the object gradually. A heavy hammer, axe and iron rod apply excessive force and are unsuitable for delicate cleaning. Thus the method and the purpose both identify option A as correct.

A spade is mainly useful at the beginning or in broad, less delicate stages of excavation, when relatively loose upper soil must be removed efficiently. As a wall, artefact or fragile layer is approached, archaeologists change to smaller tools such as trowels and brushes. A spade cannot clean a seal, decipher writing or measure beads, so option A is correct.

Sieving passes excavated soil through a mesh so that small archaeological materials can be recovered instead of being discarded with the earth. Beads, seeds, tiny bones, shell pieces and other fragments may be difficult to notice during ordinary digging. Sieving does not change soil colour, bake bricks or construct reservoirs. Therefore, its archaeological purpose is represented by option A.

The exact location, depth and layer of an object show its relationship with nearby structures, materials and other finds. This archaeological context helps researchers infer its date, function and possible association with past activities. If an object is removed without recording its position, much of its evidential value is lost. Making it attractive, changing its colour or selling it is unrelated, so option A is correct.

The governing concept is archaeological documentation. An identification number connects an excavated object with its exact trench, layer, location, date, and catalogue entry. This preserves its context and prevents objects from being confused during cleaning, storage, comparison, or later research. Therefore, option A is correct; the number does not increase value, change the object’s size, or require immediate display.

Cataloguing is the systematic process of listing, describing, numbering, and locating excavated objects. Archaeologists use a catalogue to connect each artefact with its excavation context and to make later study possible. Option A is correct because irrigation concerns water supply, fortification concerns defence, and mining means extracting minerals; none of those describes archaeological listing.

Photography is a method of preserving archaeological context. A photograph records the visible position of walls, objects, soil layers, and features before excavation changes or removes them. Researchers can later examine this visual evidence alongside notes and maps. Option A is correct; taking a photograph cannot dry soil, increase an object’s weight, or alter the site’s age.

A site map is a measured record of spatial relationships. It shows where walls, rooms, drains, pits, burials, and artefacts occur in relation to one another, allowing archaeologists to interpret the settlement’s layout and activity areas. Option A is correct. A map does not rename a site, decorate objects, or physically remove soil.

A field diary is the day-to-day working record of an excavation. Archaeologists note the date, team activities, trenches, layers, discoveries, measurements, interpretations, and unexpected problems in it. These entries support later cataloguing and analysis. Option A is correct; a religious text, trade list, or royal order serves a different purpose and does not document daily fieldwork.

Accurate measurement is a basic part of archaeological field recording. A measuring tape is used to determine the length, width, thickness, and sometimes spacing of a wall; these measurements can then be entered on a plan or site map. Option A is correct. A brush cleans surfaces, a sieve separates soil and small finds, and a telescope observes distant objects.

A compass establishes the main directions—north, south, east, and west—at an excavation site. Directional information gives every trench, structure, and find a consistent spatial reference and makes maps comparable. Option A is correct. A balance measures mass, a microscope magnifies tiny details, and a thermometer measures temperature; none of these determines site orientation.

A cultural layer is a deposit containing evidence of human activity, such as pottery, ash, tools, bones, floors, walls, or other remains. Studying its contents and position helps archaeologists identify occupation and reconstruct past activities. Option A is correct. Cloud, marine, and ice layers describe environmental or geological conditions, not an archaeological deposit formed through human use.

An ash layer is archaeological evidence that may result from repeated burning, a domestic hearth, cooking, or another fire-related activity. Archaeologists must examine its position, associated objects, and soil context before reaching a conclusion. Therefore, option A is correct; a river, stone mine, or well would not normally produce a concentrated ash layer.