Domain: Humanities and Social Sciences — Archaeology
Target concept: Pore-Related Water Absorption of Pottery Shards with Visible Bubbles

Video generation prompt: Immerse a dry, unglazed ceramic shard in a glass container filled with clear, still water and allow it to stand for several minutes.

Evaluation guide:
(i) Target concept: Capillary-driven water absorption into interconnected micropores of low-fired unglazed ceramic, with trapped pore air visibly escaping as bubbles during uptake.
Minimum mechanism: Ceramic must be porous and hydrophilic; water must be pure and still; surface tension and pore radius must permit spontaneous imbibition; air previously trapped inside the pores is displaced as water enters, which can appear as small bubbles released from the shard's surface; no surface sealant or glaze blocking pore access.
(ii)Storyline: [Frame 0] Dry shard positioned adjacent to full glass container with still water surface → [Contact onset] Shard touches water surface, initiating meniscus rise → [Absorption onset] Localized darkening begins at the water-contact zone, often accompanied by small air bubbles escaping from the shard's surface as displaced pore air rises → [Propagation phase] Darkening spreads continuously across immersed surface without reversal or patchiness, with bubble release tapering off as saturation progresses → [Stabilization] Surface fully darkened, bubbling has ceased, water undisturbed, shard motionless, all under fixed viewpoint with no extraneous interference.

Manual:
Experimental Procedure
1. Place dry, unglazed ceramic shard beside a transparent glass container filled with clear, still water.
2. Gently lower shard vertically into water until fully submerged.
3. Hold still for observation (no motion for remainder of clip).
Observation of Experimental Phenomena
Shard surface visibly darkens progressively after water contact, beginning at the immersion point and spreading across the immersed area; small air bubbles are released from the shard's pores as water displaces trapped air, most noticeable in the first seconds of contact and tapering off as saturation proceeds; water remains otherwise clear and undisturbed.
Summary of Experimental Principles
Pore-related water absorption in pottery shards: unglazed ceramic contains interconnected micropores; capillary action draws water into these pores, displacing air that was trapped inside (visible as bubbles escaping from the surface) while increasing light absorption and causing surface darkening — both are diagnostic indicators of porosity and firing conditions in archaeological ceramic analysis.

Prompt Grounding rubric:
level_1: None of the three required elements appear together: no dry unglazed ceramic shard, no glass container, and no still clear water are shown together in one scene; no immersion takes place.
level_2: Only one of the three core elements is present (just the shard, or just the container, or just the water), or two appear without being spatially joined (e.g., the shard and container are shown apart, with no water inside the container); the immersion action never happens.
level_3: The shard, container, and water all appear together: the dry unglazed shard, the transparent glass container, and the clear still water inside it; the shard is placed so it contacts the water; the container stays put throughout; the camera holds a single fixed framing (side or top-down) with shard and container always co-visible.
level_4: Everything at the 3-point level holds, and further: the shard ends up fully submerged with no part left above the surface; the water surface stays undisturbed after the shard settles (no ripple, splash, or ongoing motion); the shard itself stops moving once placed (no drifting, tilting, or floating); and the container walls stay fully see-through (no tint, frosting, or opaque coating).
level_5: Everything at the 4-point level holds, and further: the shard's surface reads as matte and unglazed, visibly distinct from a glossy glazed finish; the shard looks bone-dry immediately before contact (no pre-existing wetness, sheen, or droplets); the water is visibly clear and undisturbed immediately prior to the shard's contact (no pre-existing bubbles, floating particles, or tint before immersion begins); and no extraneous objects (hands, tools, labels) enter the frame at any point.

Scientific and Causal Correctness rubric:
level_1: No absorption phenomenon appears: the shard's surface looks the same before and after contact with the water, no darkening develops, and no bubbling or other visible response occurs at the shard-water interface.
level_2: Some visual change occurs but is not causally tied to pore absorption: e.g., the shard's color shifts uniformly and instantly upon immersion (not a gradual spread from the contact point), or bubbles rise from the water itself or the container rather than from the shard's surface, or darkening appears on parts of the shard that never touched the water.
level_3: Darkening begins at the point where the shard first meets the water and gradually spreads across the submerged surface; the water itself stays clear and at a constant level; if air bubbles appear, they visibly originate from the shard's surface (consistent with trapped pore air being displaced), rather than from the container or water bulk.
level_4: Everything at the 3-point level holds, and further: the darkening spreads continuously toward the driest remaining regions without random patches re-lightening; any bubble release stays confined to the immersed shard surface and tapers off rather than persisting indefinitely; no unrelated tint change (e.g., reddening, yellowing) appears: only a uniform deepening of tone consistent with water uptake.
level_5: Everything at the 4-point level holds, and further: small air bubbles are clearly visible escaping from the shard's pores within the first several seconds of water contact, most concentrated near the advancing dark/dry boundary and diminishing as the shard becomes fully saturated; darkening is visibly underway shortly after contact with no long stall before onset; the shard ends uniformly darker than its original dry tone with no unexplained lighter patch, and no competing surface phenomenon (e.g., flaking, crumbling, sediment release) appears alongside the absorption.

Spatiotemporal Consistency rubric:
level_1: Severe break in physical continuity: the shard appears inside the container without ever entering the water, the container changes shape or size partway through, the water appears or disappears abruptly, the overall lighting jumps sharply between frames, or the shard flips/rotates with no physical cause.
level_2: Noticeable but less extreme breaks: the shard enters the frame from off-screen and touches the water without a continuous path of motion; the container visibly wobbles or shakes for no reason; ripples from the shard's entry linger far longer than plausible; the shard's position jumps between frames rather than moving smoothly.
level_3: The shard, water, and container stay in one coherent spatial arrangement: the shard descends along a single continuous path from air into the water, the container never moves or deforms, the water surface reacts to the contact and then settles, the overall lighting stays steady across the clip, and the shard stays continuously visible without blinking out of frame or reappearing unexpectedly.
level_4: Everything at the 3-point level holds, and further: the shard's descent looks physically natural (no sudden speed-ups, stutters, or ghost trailing), the ripple or splash at contact settles within a couple of seconds, and the shard holds a constant orientation (no spinning or tipping) both while sinking and after it comes to rest.
level_5: Everything at the 4-point level holds, and further: the shard and container edges stay aligned relative to each other frame to frame with no drifting or jitter between them, there is no jump-cut, freeze, or speed change anywhere in the clip, and no lens warping distorts the visible spatial relationship between the shard, the water surface, and the container walls.