Domain: Engineering — Energy Engineering
Target concept: Heat Dissipation: Melting of Ice Cubes Over Time in Insulated and Non-insulated Containers

Video generation prompt: On the table, two identical transparent containers are placed side by side, each containing ice cubes of the same size; the container on the right is wrapped with a foam insulation layer, while the one on the left is not. The process is recorded over time until the ice cube on one side melts.

Evaluation guide:
(i) Target concept: Thermal insulation impedes conductive/convective heat flow, delaying solid-to-liquid phase transition in ice under ambient conditions.
Minimum mechanism: Ambient air must be >0°C; containers must be thermally coupled to air (not submerged or heated); foam must possess low thermal conductivity relative to container wall; ice must be pure water at initial 0°C; no external heat sources or drafts.
(ii)Storyline: Frame 0–2: Two intact, sharp-edged ice cubes in identical transparent containers, side-by-side, right container fully wrapped in matte-textured foam. Frame 3–6: Left ice shows edge softening and surface water beads; right ice remains angular with dry surface. Frame 7–9: Left ice reduced to ~50% original size with continuous liquid pool; right ice still >80% intact with minimal surface wetness. Perspective: Static frontal view, eye-level, fixed focal length, full-container framing; no occlusion; lighting uniform and top-front biased to reveal surface details.

Manual:
Experimental Procedure
1. Place two identical transparent containers side by side on a flat table.
2. Put identical ice cubes into each container.
3. Wrap only the right container completely with foam insulation.
4. Record continuously until melting difference is visually evident.
Observation of Experimental Phenomena
The ice cube in the left (non-insulated) container melts first and faster; liquid water accumulates earlier and in greater volume there; the ice cube in the right (insulated) container retains its shape longer and shows delayed melting onset.
Summary of Experimental Principles
Insulation reduces heat transfer from environment to ice, slowing phase change from solid to liquid; non-insulated container allows faster conduction/convection, accelerating melting — demonstrating thermal resistance in energy engineering.

Prompt Grounding rubric:
level_1: No two transparent containers visible; no ice cubes present; no foam insulation layer visible anywhere; containers not placed side by side on a table surface.
level_2: Two containers visible but not transparent; or ice cubes present in only one container; or foam insulation layer appears on wrong container (e.g., left instead of right); or containers not on same horizontal surface (e.g., one elevated, floating, or occluded).
level_3: Two transparent containers placed side by side on a table; both contain ice cubes of visibly identical size and shape; foam insulation layer is present on the right container only; left container has no insulation layer; all objects remain stationary throughout video.
level_4: All conditions for score 3 met, AND foam insulation layer is visually distinct as a white/pearl-gray porous material with matte texture (not metallic, glossy, or fabric-like); ice cubes retain sharp cubic geometry at start; containers show no labels, logos, or decorative elements that distract from core setup.
level_5: All conditions for score 4 met, AND foam insulation layer fully wraps the lateral and bottom surfaces of the right container (no exposed base or side gaps); left container shows zero insulation material on any surface; both containers are identically shaped cylinders or rectangular prisms with flat, level bases; no extraneous objects (e.g., hands, tools, condensation trails) enter frame at any time.

Scientific and Causal Correctness rubric:
level_1: Neither ice cube shows any visible size or shape change; or the right (insulated) ice cube begins visibly melting before the left (non-insulated) one; or a pool of liquid water appears in a container without any prior visible rounding or shrinking of that container's ice cube; or an ice cube vanishes from a container without ever passing through a visibly partial-melt state.
level_2: Both ice cubes begin softening and rounding at essentially the same time; or the first drop of liquid water appears before either ice cube shows any edge-rounding; or at any point in the video the liquid pool is smaller in the left container than in the right container; or the ice in the right (insulated) container disappears completely before the left container shows any liquid water at all.
level_3: The left (non-insulated) ice cube is the first to show edge-rounding and the first to release liquid water into its container; its liquid pool grows and its ice shrinks measurably before the right (insulated) ice cube shows a comparable amount of rounding or liquid; at the video's midpoint the right container's ice cube visibly retains more of its original cubic bulk than the left container's ice cube.
level_4: Beyond the level-3 ordering (the left container's ice cube continues to lead the right container's ice cube in both melt onset and melt progress), the left container's liquid water collects and pools at the container's base rather than appearing as floating droplets or mist; the right container's ice keeps a recognizably cubic outline for noticeably longer while the left ice becomes visibly rounded and irregular; neither ice cube shows any sign of refreezing (regrowing sharp edges) or boiling (bubbling or vapor) at any point.
level_5: Beyond the level-4 ordering and behavior (the left container's ice keeps leading the right container's ice in melt progress throughout), the volume of liquid water in the left container increases from frame to frame without ever shrinking or plateauing, while the right container's ice remains visibly less melted than the left container's ice at every frame; the ice remaining in the right container stays clear and evenly translucent rather than turning cloudy or cracking in a way inconsistent with slow, uniform melting; the water in the two containers never mixes or overflows into one another; neither the ice nor the water in either container shows an unnatural color shift such as a blue or yellow tint.

Spatiotemporal Consistency rubric:
level_1: Containers teleport between frames; ice cubes flicker in/out of existence; sudden lighting changes (e.g., flash, total shadow); container bases detach from table; foam layer discontinuously appears/disappears; camera viewpoint rotates or zooms.
level_2: Minor spatial jumps: container positions shift laterally by >1/4 container width between frames; foam layer thickness varies abruptly; ice cubes visibly jitter or vibrate without cause; table surface warps or bends; light/shadow direction flips without illumination source movement.
level_3: No teleportation or object disappearance; containers remain fixed in position and orientation; foam layer maintains consistent coverage and attachment; ice cubes stay within container boundaries; lighting and shadow remain stable in direction and intensity; table surface remains planar and static.
level_4: All conditions for score 3 met, AND motion is physically plausible: melting proceeds as smooth, continuous boundary recession (no jumping edges or pixelated dissolution); water surface remains level and undisturbed (no ripples unless caused by melting drip); no inter-frame tearing or ghosting artifacts.
level_5: All conditions for score 4 met, AND temporal continuity is perfect: every frame shows incremental, non-reversing progression of melt (no frame repeats, skips, or out-of-order sequences); no motion blur inconsistent with static camera; no structural deformation (e.g., container bowing, foam sagging) across time.