excavation methods

Correct answer: A. Soil layer and location of the object

Explanation: The governing excavation principle is archaeological context. Before removing an object, archaeologists document its soil layer, exact position, association with nearby finds and surrounding features, often through notes, drawings, photographs and coordinates. This record helps establish date, function and relationships. Option A is correct. Market value, folk songs and modern population may be unrelated research data, but they do not define the object’s excavation context.

Correct answer: B. Study of successive soil layers

Explanation: Stratigraphy is the archaeological study of the successive layers, or strata, formed at a site over time. In undisturbed deposits, lower layers are generally older than the layers above them, so their sequence helps establish relative chronology. Option B is correct because it directly describes this method. Script study, bone measurement, and coin cleaning are different activities, not stratigraphy.

Correct answer: A. Lower layers are generally older

Explanation: The governing method is stratigraphy, which studies the sequence of archaeological layers. In an undisturbed deposit, deeper layers were generally formed earlier and upper layers later; this gives an object relative chronological context. Therefore option A is correct. “Always” makes option B incorrect, while C and D ignore the evidentiary value of stratification.

Correct answer: A. From raw materials, tools and unfinished objects

Explanation: A specialised craft centre is identified through a cluster of production evidence rather than through size alone. Archaeologists look for raw materials, tools, manufacturing debris, discarded waste and unfinished objects, because these indicate that processing occurred at the site. Thus option A is correct. Large houses may have other functions, while graves and written records alone cannot establish craft production.

Correct answer: A. To identify different periods and activities

Explanation: Stratigraphy studies the sequence and character of soil deposits. Changes in colour, texture, composition, or inclusions can mark separate layers formed at different times or by different natural and human activities. Recording these differences helps establish the site’s relative sequence. Option A is correct; selling soil, making bricks, or decorating the site is not the purpose of stratigraphic observation.

Correct answer: A. Original soil deposited before human activity

Explanation: In excavation, natural soil is the undisturbed geological deposit that existed before the cultural occupation or human activity being studied. It normally lacks artefacts and helps archaeologists recognise the lowest limit of occupation. Option A is correct. Newly filled soil is a later deposit, agricultural soil is only one possible use, and pottery clay is a raw material rather than the general meaning of natural soil.

Correct answer: A. Typology

Explanation: Typology estimates relative age by comparing an object's form, style, material, and manufacturing features with examples whose sequence is already understood. Changes in design may reveal that one type is earlier or later than another, although typology does not automatically provide an exact calendar year. Option A is correct; drainage, mining, and mapping are unrelated activities.

Correct answer: A. Organic remains

Explanation: Radiocarbon dating is applied to suitable organic remains that contain carbon, such as charcoal, wood, seeds, bone, or other once-living material. The method estimates when the organism stopped exchanging carbon, and careful sampling is essential to avoid contamination. Option A is correct; ordinary stone walls, baked bricks, and metal swords are not themselves the usual radiocarbon samples.

Correct answer: A. They are organic and may survive

Explanation: Charred seeds are useful because they are organic remains and carbonised material can survive in archaeological deposits for long periods. If the sample is securely associated with the relevant layer and has not been contaminated, it may be suitable for radiocarbon dating. It can also reveal ancient crops. Option A is correct; seeds are not metal, are not always modern, and do not change a soil layer.

Correct answer: A. It may dry and crack

Explanation: Waterlogged or damp archaeological wood can be structurally fragile. Direct sunlight and rapid drying remove moisture unevenly, creating shrinkage, warping, splits, and cracks. Conservators therefore document it and keep it in controlled conditions while selecting an appropriate treatment. Option A is correct; sunlight cannot turn wood into gold or stone, and its historical age cannot increase through drying.

Correct answer: A. To scientifically study different kinds of remains

Explanation: Archaeological excavation produces many kinds of evidence, and no single specialist can interpret all of it. Botanists study seeds and plant remains, osteologists examine bones, chemists analyse materials, and conservators protect fragile objects. Their findings are combined with field records to reconstruct past activities more reliably. Guarding, selling objects, or simply removing soil faster does not explain the need for expertise; option A is correct.

Correct answer: A. Into equal squares or sections

Explanation: The governing archaeological concept is spatial control. In the grid method, an excavation area is marked into regular squares or sections, often using measured lines and coordinates. Each find can then be recorded in relation to its exact grid position and layer. Option A is correct; the other choices do not provide the systematic spatial framework required for reliable site recording.

Correct answer: A. Lower layers are generally older than upper layers

Explanation: The governing concept is stratigraphic superposition, used to establish relative chronology. In an undisturbed archaeological deposit, lower layers were generally laid down earlier and are therefore older than layers above them. Option A states this rule accurately. The word generally matters because disturbance can alter deposits; B reverses the sequence, while C and D deny the chronological value of layers.

Correct answer: A. To understand the date and context of finds

Explanation: The governing concept is archaeological stratigraphy: soil layers usually represent different stages of deposition. Recording every layer separately preserves the association between a find, its depth and nearby materials. This helps archaeologists estimate relative age and reconstruct past activities. Option A is correct; soil weight, site appearance and faster digging do not provide historical context.

Correct answer: A. To remove soil carefully

Explanation: A trowel is a small hand tool used for controlled removal of soil, especially when archaeologists are working close to walls, layers or fragile remains. Its narrow blade allows precision and reduces accidental damage. Option A is correct. Breaking large stones requires heavier tools, aerial photography uses cameras or drones, and dating metal objects requires scientific analysis rather than a trowel.

Correct answer: A. To separate small remains from soil

Explanation: Sieving is a recovery method in which excavated soil is passed through a mesh so that small objects can be noticed and collected. Beads, seeds, tiny pottery fragments and small bones might otherwise be missed. Option A is correct. A sieve does not fire bricks, measure elevation or repair artefacts; those tasks require different equipment and procedures.

Correct answer: A. Grid and coordinates

Explanation: Archaeologists divide a site into a grid and use measurements or coordinates to record where a find lies horizontally and vertically. This spatial information preserves the object’s relationship to layers, structures and other finds. Option A is correct. Colour and weight may be recorded as descriptive details, while market value has no role in locating an object.

Correct answer: A. Details of daily digging, layers and finds

Explanation: An excavation diary is a systematic field record. It normally notes the date, work completed, layers exposed, structures observed, objects recovered, problems and preliminary observations. Such entries allow the excavation to be checked and interpreted later. Option A is correct. Personal shopping, an isolated weather guess and tourism income are not the diary’s principal archaeological contents.

Correct answer: A. To create a permanent record of structures and finds

Explanation: Archaeological drawing records plans, sections, dimensions and the positions of structures or finds in a clear, measured form. It preserves information that may disappear when layers are removed or exposed surfaces change. Option A is correct. Drawing does not make excavation faster, reduce soil, or alter an artefact’s colour; its purpose is accurate documentation and interpretation.

Correct answer: A. Creating a visual record of finds and layers

Explanation: Photography provides a visual record of layers, structures, finds and the condition of a site at each stage of excavation. Images can later be compared with drawings, measurements and written notes to support interpretation. Option A is correct. A camera does not harden soil or automatically date objects, and making a site appear larger is not an archaeological benefit.

Correct answer: A. Its context, photograph and location must first be recorded

Explanation: An artefact’s archaeological value depends not only on its material but also on its context: layer, position, nearby objects and associated structure. Excavators should photograph it, measure and label its location, and document the surrounding evidence before lifting it. Option A is correct. Weight gain, automatic breakage and colour change are not the general reason for delaying removal.

Correct answer: A. To maintain its identity and link with records

Explanation: Numbering and labelling are parts of archaeological cataloguing. A unique identifier connects an artefact to its field record, site, trench, layer, find location, photographs and later storage or study. Option A is correct because it preserves identity and provenance. A label does not increase market value, change colour or make an ancient object modern.

Correct answer: A. To observe the vertical sequence of layers

Explanation: A baulk is an unexcavated strip deliberately retained so that the exposed vertical face shows the succession of soil and cultural deposits. Archaeologists study this stratigraphy to determine which layers are earlier or later and to understand changes in occupation. Therefore, option A is correct. It is not left to stop work, conceal finds, cultivate the site, or serve merely as unused earth.

Correct answer: A. The sequence and thickness of layers

Explanation: A vertical section displays the successive deposits from the surface downward. Its layers can be compared for order, thickness, soil character, and evidence of occupation, allowing archaeologists to reconstruct stratigraphy and relative chronology. Thus option A is correct. A section is not primarily a measurement of the site’s width, a modern road’s direction, or the market value of an artefact.

Correct answer: A. To understand the spread of structures belonging to the same period

Explanation: Horizontal excavation expands across a layer or occupation phase rather than simply digging deeper. It exposes the spatial arrangement of houses, streets, floors, drains, and other features belonging to a broadly similar period. Therefore option A is correct because it helps reconstruct settlement layout. Reaching the deepest layer is the aim of neither every horizontal excavation nor chemical testing or site closure.