Domain: Engineering — Civil & Environmental Engineering
Target concept: The left bin's garbage volume was significantly reduced and turned into brown matured material, while the right bin's garbage deteriorated and showed little change in volume.

Video generation prompt: Two transparent sealed containers with the same amount of food waste are placed side by side on a table. A biodegradation agent is added to the container on the left, while no agent is added to the one on the right. After being placed for 5 days, the biodegradation effects are compared.

Evaluation guide:
(i) Target concept: Differential biodegradation outcomes under controlled presence/absence of microbial agent.
Minimum mechanism: Aerobic microbial activity must be enabled in left container (yielding brown, dry, granular humus) while suppressed or diverted to anaerobic pathways in right container (yielding wet, foul, structurally persistent waste with visible spoilage signs).
(ii)Storyline: Frame opens on static overhead/slightly angled frontal view of two identical transparent containers on plain table. Both contain visibly similar food waste (chopped vegetables, grains, scraps). A hand enters from bottom edge, applies granular or liquid agent only to left container, withdraws. Scene holds still for remainder. At conclusion: left container shows compact, brown, soil-like mass occupying less volume; right container shows swollen, darker, uneven waste with patches of mold or slime, retaining original bulk. No camera movement, no cuts, no added graphics; only direct visual comparison.

Manual:
1. Place two identical transparent sealed containers side-by-side on a table; fill each with equal visible amount of raw food waste.
2. Add biodegradation agent exclusively to left container; leave right container untreated.
3. Maintain stillness for full duration (5 days implied).
Observation: Left container shows reduced volume and brown matured material; right container shows minimal volume change and signs of deterioration (e.g., darkening, mold, liquefaction).
Principle: Biodegradation agents accelerate aerobic decomposition into stable humus-like material; absence leads to anaerobic or incomplete degradation with spoilage.

Prompt Grounding rubric:
level_1: No two transparent sealed containers are visible anywhere in frame; no food waste is present in either container; no biodegradation agent is visible being added to anything; there is no visual indication that any time has elapsed (e.g., no change from a fresh, uniform state to an aged state).
level_2: Two transparent containers present but not side-by-side (e.g., stacked, overlapping, or separated by large distance); food waste appears in only one container; biodegradation agent is absent or placed in wrong container; no visual differentiation between left and right labeling or spatial orientation.
level_3: Two transparent sealed containers placed side-by-side on same table surface; both contain visible food waste; biodegradation agent is present in left container and absent in right container; no temporal progression cues (e.g., no before/after labels, no clock, no date stamp), but spatial arrangement and agent placement match posted_prompt.
level_4: All elements of score 3 are present AND the video includes a clear fixed viewpoint showing left/right orientation established purely through consistent camera framing and the inherent scene layout (no on-screen text, arrows, or other added graphics, consistent with the guide's 'no added graphics' constraint); food waste quantity appears subjectively equal at start (no visible volume disparity before treatment); no misplacement of agent or container swap.
level_5: All elements of score 4 are present AND the video shows continuous, unbroken framing from start to end with no cuts or edits that disrupt spatial continuity; both containers remain fully visible and identically framed throughout; biodegradation agent is applied only once, visibly into left container before any change occurs; no extraneous objects occluding either container at any frame.

Scientific and Causal Correctness rubric:
level_1: No discernible state change in either container; both show identical appearance (same color, same volume, same texture) throughout; no brown material visible; no volume reduction visible; no deterioration visible in right container.
level_2: One container shows a color change (e.g., brown), but it is the wrong one (right instead of left); or volume reduction occurs in right container instead of left; or both containers show identical deterioration or identical maturation; no contrast in outcome.
level_3: Left container shows brown matured material AND reduced volume relative to initial appearance; right container shows no brown material AND little or no volume reduction; both containers retain original food waste shape/texture at start (implied or shown), and contrast in outcome is visually present.
level_4: All elements of score 3 are present AND the brown material in left container is solid, granular, and non-liquid (no pooling, no slurry); right container shows visible signs of deterioration (e.g., darkening, mold patches, liquefaction, or foul discoloration) distinct from browning; no reversal or mixing of states (e.g., no brown material in right, no undegraded food waste dominant in left).
level_5: All elements of score 4 are present AND the brown matured material occupies the majority of left container's visible volume (not just a thin layer or spot); right container retains recognizable food waste morphology (e.g., identifiable scraps, chunks) without significant structural collapse, i.e., deterioration is incomplete, not complete decomposition; no ambiguous intermediate states (e.g., uniform gray, slimy black, or homogenous paste) that contradict "little change in volume" and "deteriorated" as defined in knowledge points.

Spatiotemporal Consistency rubric:
level_1: One or both containers change position or appear/disappear abruptly between frames (e.g., a container is absent for a frame then present again, or swaps to the opposite side of the table); a container's shape distorts, stretches, or rotates unnaturally; the lighting on the scene abruptly swings between bright and dark with no source (e.g., a hand, the agent being added, or a camera move) to explain it; the table surface or background changes texture or layout discontinuously with no camera movement to explain it.
level_2: The framing shakes or jitters noticeably; the hand applying the agent overlaps or covers the right (untreated) container at any point, or continues to cover the left container well after the agent has clearly been applied; a visible cut or splice causes either container's position or orientation to jump; the left/right identity of the containers becomes ambiguous partway through (e.g., they appear to trade places).
level_3: Both containers stay continuously visible and in the same left/right positions throughout, aside from the brief, expected covering of the left container by the hand while the agent is being applied; neither container's shape, size, or orientation changes; the table and background remain the same throughout; the hand's motion while applying the agent is smooth and physically plausible rather than jerky or abruptly appearing.
level_4: All elements of score 3 are present AND the only moving object in the scene is the single hand that enters to apply the agent to the left container and then exits; no other objects move, and the right container is never touched or covered; there is no camera pan, tilt, zoom, or dolly at any point; there is no parallax shift between the two containers and the table that would suggest the viewpoint moved.
level_5: All elements of score 4 are present AND the hand's entry and exit follow a natural, continuous accelerate-then-decelerate motion rather than appearing or vanishing mid-frame; there is no frame repetition or stutter; container edges remain visually stable and crisp throughout, with no noticeable flicker or shimmer along their outlines.