Domain: Natural Science — Earth Science
Target concept: The mineralization process of fossilized organisms

Video generation prompt: A porous sponge sample was placed in a beaker. Calcium carbonate solution was then gradually poured in until the sponge's base was fully submerged.

Evaluation guide:
(i) Target concept: Capillary-driven infiltration of aqueous mineral solution into a biogenic porous substrate as the first mechanistic step in permineralization.
Minimum mechanism: Solution must be miscible with water, low-viscosity, and chemically inert toward sponge collagen/chitin; sponge must possess open, interconnected porosity to permit bulk fluid entry; gravity and capillary pressure must jointly drive vertical wetting front progression.
(ii)Storyline: [Frame 0–2] Dry sponge placed centrally in beaker → [Frame 3–4] Solution poured, contacting sponge base → [Frame 5–10] Wetting front visibly advances upward *within* pore lumens (not just surface coating), evidenced by progressive darkening confined to pore pathways; view remains fixed frontal-macro (no zoom/pan), ensuring full sponge-beaker spatial relationship is continuously visible; no time-lapse or accelerated change — only real-time infiltration dynamics observable in 10s.

Manual:
Experimental Procedure
1. Place dry porous sponge sample upright in clear glass beaker.
2. Slowly pour colorless calcium carbonate solution into beaker until base of sponge is submerged.
3. Observe immediate infiltration of solution into sponge pores.
Observation of Experimental Phenomena
Solution advances upward through interconnected pores, causing localized darkening and increased opacity within pore channels — no surface crystallization, no bubbling, no dissolution.
Summary of Experimental Principles
Calcium carbonate solution infiltrates porous matrix via capillary action; this simulates early-stage mineralization where dissolved ions enter void spaces of organic templates — prerequisite for later fossilization via precipitation and replacement.

Prompt Grounding rubric:
level_1: No sponge is visible, no beaker is shown, and no liquid is poured; the scene bears no resemblance to a sponge placed in a beaker of solution.
level_2: A sponge, a beaker, or some liquid appears, but they are not correctly combined: for example the sponge sits loose on a table with no beaker around it, or liquid appears in a container without the sponge ever being placed inside it, or the pouring action is never shown at all.
level_3: A porous sponge is placed inside a beaker, and a solution is visibly poured into the beaker so that it contacts the sponge; both objects are clearly present and co-located in the same shot, though it is unclear exactly how far up the sponge the liquid rises.
level_4: All elements from the 3-point level are present, and additionally: the sponge's surface visibly shows an open, porous texture with visible holes or voids rather than looking like a solid block; the poured solution's contact with the sponge's base is continuous and unbroken along its width; the beaker does not move, tip, or get repositioned once the sponge and solution are in place.
level_5: All elements from the 4-point level are present, and additionally: the sponge sits centered in the beaker rather than pressed against one side; the solution is poured until its level clearly sits above the sponge's base but below the sponge's top edge, matching a base-submerged, not-fully-covered fill line; the liquid surface is flat and holds that level once the pouring stops; the sponge's position and orientation inside the beaker do not shift for the rest of the video.

Scientific and Causal Correctness rubric:
level_1: The video shows behavior that contradicts how a calcium carbonate solution should behave with a porous sponge: for example the sponge visibly dissolves or crumbles, the solution bubbles or fizzes, the liquid or sponge turns an implausible color such as blue, green, or red, or solid crystals appear on the sponge's outer surface with no sign the liquid ever entered the pores.
level_2: Only one part of the expected infiltration behavior is wrong: for example the calcium carbonate solution is visibly tinted a color instead of staying clear and colorless, or the sponge darkens all at once rather than showing the liquid working upward from the wetted base, or solid mineral deposits appear on the sponge within the depicted seconds even though that would require the 30-day standing period the prompt does not show.
level_3: The sponge keeps its shape and structure throughout, with no dissolving, crumbling, or bubbling; the calcium carbonate solution stays clear and colorless; the part of the sponge touching the liquid visibly darkens or becomes more translucent as the liquid works into the pore network, rather than the liquid simply sitting on the outer surface.
level_4: All elements from the 3-point level are present, and additionally: the darkened, liquid-saturated region of the sponge is deepest near the submerged base and fades gradually toward the dry upper portion, consistent with liquid rising through connected pores rather than the whole sponge darkening simultaneously; no crystal growth or solid mineral deposit is visible anywhere on the sponge, since that would require the 30-day standing period this short clip does not depict.
level_5: All elements from the 4-point level are present, and additionally: the boundary between the wetted, darker lower region and the dry, lighter upper region of the sponge is visible and distinct rather than a vague gradient covering the whole sponge; the solution touching and inside the sponge stays clear with no cloudiness, film, or floating particles; nothing in the clip's color, texture, or motion suggests any mineral precipitation or crystal formation is already underway.

Spatiotemporal Consistency rubric:
level_1: The sponge jumps to a different spot inside the beaker between frames, or is visible in one frame and completely absent from the beaker in the next without ever being lifted out; the beaker itself flips, rotates abruptly, or relocates on the table; the poured liquid appears already at full level in one frame with no pouring shown beforehand; the sponge visibly balloons or collapses in size within a frame or two; or the room's lighting swaps abruptly between bright and dark with no visible cause.
level_2: The sponge drifts sideways or tilts inside the beaker without anything visibly pushing it; the beaker shakes or shifts position inconsistently between frames; the liquid surface goes from still to visibly sloshing and back to still within a couple of frames with no pour or disturbance to explain it; the sponge's visible pore pattern changes shape from one frame to the next; or a shadow on the beaker or sponge suddenly shifts direction with no change in the light source.
level_3: The sponge stays in the same spot and orientation inside the beaker for the whole video; the beaker sits still on the table throughout; once the pour finishes, the liquid surface settles and stays level rather than continuing to slosh; the sponge does not tear, warp, or visibly poke through the beaker wall at any point.
level_4: All elements from the 3-point level are present, and additionally: the liquid's edge visibly curves up slightly where it meets the beaker's glass wall and dips slightly at the sponge's edge, the way a real liquid surface would; the sponge's pore pattern looks the same size and shape across the video rather than morphing; the sponge and the beaker rim stay in consistent alignment with no sudden shift in how one overlaps the other.
level_5: All elements from the 4-point level are present, and additionally: there is no dropped frame, stutter, or sudden blur that hides the pore structure at any point; if the camera moves at all, the sponge and beaker move together as a single rigid scene rather than sliding relative to each other; after the initial pour settles, the liquid surface stays visibly calm and flat for at least 80% of the video's duration instead of continuing to ripple; the sponge's pore detail stays in consistent focus rather than flickering between sharp and blurred.