Domain: Healthcare — Pharmacy
Target concept: Solubility of powder tablets versus intact tablets in water

Video generation prompt: Two identical transparent glass beakers containing still distilled water: a ground tablet is added to the left beaker, and a whole tablet is added to the right beaker, without stirring.

Evaluation guide:
(i) Target concept: Relative dissolution kinetics governed by surface-area-to-volume ratio and physical form (powder vs. compressed solid).
Minimum mechanism: Water must be chemically inert toward tablet excipients; tablet must contain water-soluble active/coating; powder must be mechanically liberated (no binder-limited agglomeration); no external energy input (e.g., stirring, heat) permitted.
(ii)Storyline: [Frame 0] Two identical beakers filled with still distilled water enter static view, side-by-side. → [Frame ~1] Ground tablet introduced into left beaker: particles scatter upon contact, no clumping. → [Frame ~2] Whole tablet placed into right beaker: lands cleanly, no bounce/chip, rests flat. → [Frames 3–9] Left beaker: particles remain separated, descend individually or form diffuse suspension layer; right beaker: tablet retains sharp edges, uniform surface, zero dissolution halo or clouding. → Perspective: Fixed frontal, eye-level shot capturing full height of both beakers; no occlusion; lighting reveals texture/refraction without glare; background neutral and non-distracting.

Manual:
Experimental Procedure
1. Place two identical transparent glass beakers side-by-side on a flat surface.
2. Fill both beakers with equal volumes of still distilled water.
3. Add a ground (powdered) tablet to the left beaker.
4. Add a whole (intact) tablet to the right beaker.
5. Do not stir or disturb either beaker.
Observation of Experimental Phenomena
- Powder in left beaker disperses into individual particles and gradually sinks or suspends.
- Whole tablet in right beaker remains fully intact, with no visible surface change, erosion, or dissolution front.
- Clear visual contrast emerges: left beaker shows particulate dispersion; right beaker shows structural persistence.
Summary of Experimental Principles
Powdered tablets have greater surface area exposed to solvent, enabling faster wetting and dissolution initiation compared to intact tablets, which dissolve slowly from the outer surface inward due to limited contact area and potential coating barriers.

Prompt Grounding rubric:
level_1: No two transparent glass beakers are visible; or one or both beakers lack the still, clear water described in the setup; or no tablet or powder appears in either beaker; or the ground tablet and whole tablet are swapped between the two beakers; or the two beakers are stacked, offset diagonally, or otherwise not placed next to one another.
level_2: Exactly two transparent glass beakers sit side by side, both holding liquid, but at least one liquid is not clear and colorless the way distilled water should be (e.g., cloudy, tinted, or containing floating debris beyond the tablet/powder); or the left beaker holds a whole tablet instead of powder; or the right beaker holds powder instead of a whole tablet; or one of the two beakers never receives its tablet or powder.
level_3: Two transparent glass beakers sit side by side, each filled with still, clear, colorless liquid consistent with distilled water; the left beaker contains visibly granular or powdery material with no intact tablet shape; the right beaker contains a single tablet that looks whole and unbroken at the moment it is placed in the water (this initial placement only -- later changes to the tablet are judged elsewhere, not here); no stirring rod, spoon, or hand motion disturbs either beaker at any point in the video.
level_4: All conditions for score 3 satisfied, AND the two beakers match each other in shape, size, glass material, and clarity; the material added to the left beaker looks like loose, fine grains rather than large chunks -- no clump bigger than the original tablet itself -- consistent with a tablet that was ground before adding; no mortar, pestle, spoon, dropper, or hand remains visible in frame after the initial addition to either beaker; the camera keeps both beakers fully in frame with neither cropped at the edges.
level_5: All conditions for score 4 satisfied, AND the two beakers stand at the same height and the same distance from the camera, with even spacing between them; the tablet in the right beaker rests flat against the beaker's base as originally placed; the moment of adding powder to the left beaker and the tablet to the right beaker is fully visible on-screen with no cut-away; the camera viewpoint stays fixed, keeping both beakers equally centered in frame for the entire video.

Scientific and Causal Correctness rubric:
level_1: No visible difference in dissolution behavior appears between the two beakers; or both beakers behave identically (e.g., both dissolve rapidly, both stay completely unchanged, or both produce bubbles/froth); or the powder in the left beaker vanishes abruptly and completely within a single moment rather than dispersing gradually, while the tablet in the right beaker shows no corresponding change at all.
level_2: At least one beaker shows behavior inconsistent with the setup: the whole tablet in the right beaker visibly breaks apart, crumbles, or loses structural integrity within the first half of the video; or the powder in the left beaker clumps into large insoluble masses that never disperse; or the liquid in both beakers changes color or clarity in the same way; or the tablet in the right beaker appears to dissolve faster than the powder in the left beaker.
level_3: The left beaker shows the powder visibly dispersing into the water (grains separating, sinking individually, or forming a diffuse suspension); the right beaker shows the whole tablet remaining fully intact with no surface erosion, coating loss, edge softening, or bubble emission, and no dissolution front, halo, or clouding forms around it; by the end of the video, the difference in behavior between the two beakers is clearly visible.
level_4: All conditions for score 3 satisfied, AND the powder in the left beaker does not settle into one dense, compact layer -- the grains stay separated and spread out; the whole tablet in the right beaker shows no surface alteration whatsoever -- no localized cloudiness, no meniscus distortion near the tablet, no micro-bubbling, no blurring at its edges -- consistent with its much lower immediate solubility compared to the powder.
level_5: All conditions for score 4 satisfied, AND the powder in the left beaker keeps dispersing continuously and progressively, without abruptly stopping, re-clumping, or forming a dense sediment layer or floating aggregate; the whole tablet in the right beaker keeps its sharp edges and uniform surface reflectivity throughout; no trace of a dissolution interface ever appears at the tablet's surface (no faint halo, no localized turbidity gradient, no refractive distortion at the tablet-water boundary).

Spatiotemporal Consistency rubric:
level_1: Either beaker, the powder, or the whole tablet vanishes and reappears at a different position between frames; or the water level in either beaker jumps up or down with no visible cause; or the camera abruptly cuts to a new angle or zooms during the shot; or the overall scene brightness or color cast changes abruptly as if a different light source switched on.
level_2: The powder cloud in the left beaker or the reflections on the tablet in the right beaker flicker in and out between consecutive frames instead of changing smoothly; or the water's meniscus in either beaker distorts or tilts abruptly with no object entering the liquid; or the two beakers appear to shift position or spacing relative to each other partway through the clip; or the highlights on the glass jump inconsistently as though the light source itself moved.
level_3: Both beakers stay continuously visible in the same position and spacing throughout the video; each water surface stays level and changes only gradually (e.g., powder settling or grains gently drifting through the water), with no sudden jumps; the reflections and highlights on both beakers' glass stay in roughly the same place on-screen from frame to frame, consistent with a stationary light source and camera.
level_4: All conditions for score 3 satisfied, AND neither beaker's outline stretches, shears, or warps across frames; the settling powder and the still tablet show no frozen, skipped, or stuttering motion; there is no parallax shift between the two beakers suggesting camera or mount instability; reflections on both beakers stay anchored to the same relative position on each beaker as the beakers themselves.
level_5: All conditions for score 4 satisfied, AND the powder particles continue their descent or settling smoothly with no visible jump or stutter in their trajectories; neither the tablet nor either beaker shows any visible shaking, bouncing, or vibration; both water surfaces stay level and calm with no unexplained ripple; the horizontal alignment and spacing between the two beakers stays visually constant from the first frame to the last.