Sixth Grade Social Studies: Archaeology, Artifacts, and Anthropology

Archaeology and anthropology are scientific disciplines that recover material remains and study cultural patterns to reconstruct past human societies.

The Science of Anthropology

Anthropology is the comprehensive scientific study of human beings, their evolutionary ancestors, cultural customs, and social relationships across time and space. Anthropologists examine what it means to be human by analyzing language, kinship, religious traditions, diet, and social organization.

The Subfields of Anthropology

Anthropology is broadly structured into four major subfields: cultural anthropology, linguistic anthropology, biological (physical) anthropology, and archaeology.

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|                    THE FOUR SUBFIELDS OF ANTHROPOLOGY                 |
+-----------------------------------+-----------------------------------+
| CULTURAL ANTHROPOLOGY             | LINGUISTIC ANTHROPOLOGY           |
| Studies living cultures, customs, | Analyzes the origins, structures, |
| rituals, and social hierarchies.  | and evolution of human languages. |
+-----------------------------------+-----------------------------------+
| BIOLOGICAL ANTHROPOLOGY           | ARCHAEOLOGY                       |
| Examines human genetics, skeletal | Excavates and interprets material |
| remains, and hominid evolution.   | artifacts left by past societies. |
+-----------------------------------+-----------------------------------+

Cultural Relativism vs. Ethnocentrism

When studying past or distant cultures, anthropologists emphasize cultural relativism—evaluating a society's practices and beliefs according to its own values and challenges rather than using modern cultural standards. In contrast, ethnocentrism is the misleading tendency to judge another culture solely by the preconceptions of one's own culture, viewing one's own heritage as superior.

Archaeology: Unearthing the Past

Archaeology is the branch of anthropology that studies past human societies by excavating, recovering, and analyzing material remains, such as tools, pottery, foundations, and food refuse.

Artifacts, Ecofacts, and Features

Archaeologists categorize their discoveries into distinct physical classifications. An artifact is any portable object made, modified, or used by human beings, such as stone spearheads, bronze pins, ceramic pots, and coins. An ecofact is an organic specimen that reveals environmental conditions and human diet, such as animal bones, charred plant seeds, and pollen grains. A feature is a non-portable human-made structure that cannot be moved without destroying it, such as fire pits, drainage trenches, house walls, and burial mounds.

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|                       EXCAVATION STRATIGRAPHY                         |
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| [LAYER 1: Present Day]    Topsoil, modern plastics, modern roads      |
| --------------------------------------------------------------------- |
| [LAYER 2: Medieval Era]   Iron nails, glazed ceramics, horse bones   |
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| [LAYER 3: Roman Period]   Bronze coins, mosaic tiles, roof bricks     |
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| [LAYER 4: Bronze Age]     Bronze spearheads, crude pottery shards     |
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| [LAYER 5: Stone Age]      Flint blades, charcoal embers, deer teeth   |
| --------------------------------------------------------------------- |
| [BEDROCK: Geological]     Native stone deposit prior to human presence|
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The Law of Superposition and Stratigraphy

Stratigraphy is the study of rock and soil layers (strata) deposited over time. Archaeologists apply the Law of Superposition, which states that in undisturbed geological and archaeological contexts, older layers lie underneath younger layers. Excavating downward through soil layers is like traveling backward in time.

Archaeological Field Methods

Archaeological excavations are carefully planned scientific operations rather than uncoordinated treasure hunts.

Survey and Site Identification

Before digging, archaeologists conduct systematic surface surveys. They inspect historical records, analyze satellite photos, conduct ground-penetrating radar scans, and observe variations in ground elevation and vegetation growth to pinpoint subsurface structures without disturbing the earth prematurely.

Excavation and Grid Systems

During excavation, archaeologists divide the terrain into an exact metric grid using wooden stakes and taut strings. Every artifact unearthed is plotted using three-dimensional coordinates (northing, easting, and depth below surface). Soil is carefully sifted through fine mesh screens to recover small fish bones, beads, and stone flakes.

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|                      EXCAVATION GRID METHODOLOGY                      |
+-----------------------------------------------------------------------+
|          Grid Square A1       Grid Square A2       Grid Square A3     |
|       +--------------------+--------------------+--------------------+|
|       | [Pottery Shard]    | [Intact Hearth]    | [Post Hole]        |
|       | Depth: 45 cm       | Depth: 52 cm       | Depth: 48 cm       |
|       +--------------------+--------------------+--------------------+|
|          Grid Square B1       Grid Square B2       Grid Square B3     |
|       +--------------------+--------------------+--------------------+|
|       | [Animal Jawbone]   | [Flint Core]       | [Copper Bead]      |
|       | Depth: 60 cm       | Depth: 63 cm       | Depth: 59 cm       |
|       +--------------------+--------------------+--------------------+|
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Dating Techniques: Relative vs. Absolute Dating

Archaeologists combine relative and absolute dating methods to determine the age of recovered specimens.

Relative Dating Techniques

Relative dating establishes whether an object is older or younger than another object without assigning a numerical calendar date. Stratigraphy is the primary relative dating technique. Another method is seriation, which tracks how artifact styles, such as pottery shapes or tomb designs, evolved over time.

Absolute Dating Techniques

Absolute dating provides an estimated numerical age or calendar date range for an artifact or fossil. The most famous absolute dating technique for organic matter is radiocarbon dating (Carbon-14 dating). Living organisms absorb atmospheric Carbon-14; upon death, this radioactive isotope decays into Nitrogen-14 at a known half-life rate of approximately 5,730 years. By measuring the remaining Carbon-14, scientists date organic remains up to roughly 50,000 years old. Other absolute dating methods include dendrochronology (counting annual tree rings) and potassium-argon dating for ancient volcanic rocks.

Review Exercises

Exercise 1: Describe the differences among an artifact, an ecofact, and a feature, providing an example of each from an ancient archaeological site.

Exercise 2: Explain the Law of Superposition and discuss why understanding stratigraphy is vital when excavating an archaeological site.

Exercise 3: Compare relative dating and absolute dating, explaining how radiocarbon dating allows scientists to determine the age of organic remains.

Solutions

Solution 1: An artifact is a portable object created or altered by humans, such as a carved stone arrowhead or an intact clay oil lamp. An ecofact is an organic specimen that reveals natural resources and dietary habits without being explicitly manufactured into a tool, such as charred wheat grains or butchered cattle bones. A feature is an immovable, non-portable human structure, such as a stone wall foundation, a drainage canal, or a burial pit.

Solution 2: The Law of Superposition states that in undisturbed sedimentary and archaeological deposits, the oldest layers are deposited at the bottom, while progressively younger layers accumulate above them. Stratigraphy is vital because it establishes a clear relative chronological sequence; artifacts discovered in lower strata were used and buried earlier than objects found in upper strata, preventing researchers from confusing different time periods.

Solution 3: Relative dating determines whether an object is older or younger than another artifact without providing a specific calendar date, based on stratigraphic position or changing artistic styles. Absolute dating calculates a numerical age in years. Radiocarbon dating measures the decay rate of Carbon-14 isotopes remaining in organic materials, such as bone, wood, or textile fibers. Because Carbon-14 decays at a steady, measurable half-life of 5,730 years, scientists calculate how many years have passed since the organism died.