Domain: Natural Science — Chemistry
Target concept: Steel wool undergoes rapid oxidation in hydrogen peroxide, demonstrating an accelerated oxidation process.

Video generation prompt: Place two identical steel wool pads on a ceramic dish; pour hydrogen peroxide onto the left pad while keeping the right one dry, and capture images of both from the same angle continuously.

Evaluation guide:
(i) Target concept: Catalyzed oxidation of elemental iron via hydrogen peroxide decomposition, producing iron oxide and oxygen gas.
Minimum mechanism: Hydrogen peroxide must decompose at the iron surface, generating reactive oxygen species that oxidize Fe⁰ → Fe²⁺/Fe³⁺; this requires direct liquid-solid contact and is inhibited without catalyst (dry pad remains unoxidized).
(ii)Storyline: Frame 1–2: Two identical dry steel wool pads side-by-side on ceramic dish, fully visible, fixed viewpoint. Frame 3–4: Hydrogen peroxide liquid contacts left pad surface (no contact with right pad). Frame 5–10: Left pad exhibits progressive, localized brown/orange coloration and continuous surface bubbling; right pad remains unchanged in color, texture, and dryness. Throughout: No occlusion, no viewpoint shift, no external interference; all causality is visually anchored to contact event.

Manual:
Experimental Procedure
1. Place two identical steel wool pads side-by-side on a white ceramic dish.
2. Pour colorless hydrogen peroxide liquid onto the left pad only — ensure right pad remains completely dry.
3. Record continuously from a fixed frontal viewpoint showing both pads fully and simultaneously.
Observation of Experimental Phenomena
Left pad rapidly develops brown/orange rust-colored regions and visible effervescence (bubbling); right pad shows no color change and no bubbling throughout.
Summary of Experimental Principles
Steel wool (iron) undergoes rapid oxidation when catalyzed by hydrogen peroxide, forming iron oxide (rust); the dry pad serves as inert control, confirming hydrogen peroxide is required for accelerated oxidation.

Prompt Grounding rubric:
level_1: No steel wool pads visible; no ceramic dish; no hydrogen peroxide liquid; no side-by-side arrangement; no fixed viewpoint showing both pads simultaneously.
level_2: At least one steel wool pad present, and a ceramic dish is visible, but pads are not placed side-by-side on the dish; or hydrogen peroxide is present but not poured onto left pad; or right pad is absent or not dry; or viewpoint does not show both pads in same frame.
level_3: Two steel wool pads placed side-by-side on a ceramic dish; hydrogen peroxide is visibly present as a liquid; left pad is contacted by liquid; right pad remains dry; both pads are fully visible in same fixed frame throughout video; no object substitution or missing core tools.
level_4: All conditions for score 3 satisfied, AND steel wool pads are identical in size, shape, and color before contact; ceramic dish is uniform and non-reflective; hydrogen peroxide liquid appears colorless and transparent; no temporal misalignment (e.g., pouring occurs before pad placement or after observation window).
level_5: All conditions for score 4 satisfied, AND spatial layout is strictly side-by-side with clear visual separation (no overlap, occlusion, or merging); liquid contact is unambiguously localized only to left pad surface (no spillage onto right pad or dish beyond immediate contact zone); dry state of right pad is continuously verifiable (no moisture sheen, darkening, or condensation) across entire duration.

Scientific and Causal Correctness rubric:
level_1: No oxidation phenomenon observed; no color change, no effervescence, no heat-induced steam/fog; or both pads behave identically (e.g., both darken or both bubble); or phenomenon occurs without hydrogen peroxide contact.
level_2: Color change or bubbling appears, but on wrong pad (e.g., right pad darkens/bubbles while left remains inert); or phenomenon appears before liquid contact; or phenomenon is inconsistent with rapid oxidation (e.g., slow uniform darkening instead of localized, vigorous reaction).
level_3: Left pad shows localized, rapid visual changes distinct from right pad: appearance of brown/orange rust-colored regions AND visible effervescence (bubbling/gas evolution) beginning within first few frames after contact; right pad shows no color change and no effervescence at any time.
level_4: All conditions for score 3 satisfied, AND left pad’s rust-coloration is confined to areas directly contacted by liquid (not spreading uniformly); effervescence is continuous and originates from pad surface (not from liquid alone); right pad remains visually identical to initial state (same brightness, texture, color tone) with no transient discoloration or wetting artifacts.
level_5: All conditions for score 4 satisfied, AND rust-coloration progresses visibly during video (new brown/orange regions appear over time); effervescence maintains consistent intensity and origin point; no false phenomena (e.g., no smoke, flame, splashing, or unnatural shimmer) and no reversal (e.g., no fading of rust or cessation of bubbles once started).

Spatiotemporal Consistency rubric:
level_1: Severe spatiotemporal breakdown: teleportation of pads or dish; abrupt disappearance/reappearance; frame drops causing jump cuts; lighting changes that erase object visibility; structural warping of ceramic dish or steel wool; multiple incompatible viewpoints.
level_2: Moderate breakdown: one pad shifts position between frames without motion continuity; liquid appears/disappears without pouring action; shadows or highlights flicker erratically; dish surface deforms or rotates; steel wool fibers visibly stretch, melt, or vanish mid-sequence.
level_3: All objects maintain consistent spatial relationships: pads remain stationary relative to dish and each other; liquid stays in contact with left pad without flowing off or evaporating unrealistically; lighting and shadow remain stable; no object distortion, stretching, or interpenetration.
level_4: All conditions for score 3 satisfied, AND motion is physically plausible: pouring action (if shown) has smooth deceleration on impact; no floating, levitating, or gravity-defying behavior; no abrupt scaling/zooming; camera remains fixed with zero pan/tilt/roll.
level_5: All conditions for score 4 satisfied, AND temporal flow is perfectly continuous: no interpolation artifacts, no ghosting, no frame blending; every frame shows coherent physical state progression (e.g., bubble formation advances incrementally, not jumping between stages); no duplicated or frozen frames.