Domain: Natural Science — Environmental Science
Target concept: Comparison of temperature rise and fall between bare soil and vegetation-covered soil under the same light conditions over time

Video generation prompt: Two shallow trays were placed side by side under a heating lamp: one with bare soil and the other with soil covered by dense green vegetation; the heating lamp was turned on before filming and turned off afterward, with occasional switches to a top-down thermal imaging perspective.

Evaluation guide:
(i) Target concept: Differential radiative heating response of land surface materials under identical incident energy flux.
Minimum mechanism: Surface must consist of two physically distinct substrates, one with high absorptivity/low latent heat loss (bare soil), one with high reflectivity + evaporative cooling capacity (dense green vegetation), under sustained directional irradiation from a fixed source.
(ii)Storyline: [Phase 1: Setup] Two shallow trays placed adjacent, stationary, under a fixed lamp: bare soil visible in the left tray, dense green vegetation fully covering the soil in the right tray. [Phase 2: Activation] Lamp visibly ON prior to the first thermal-imaging shot, with no flicker, no delay. [Phase 3: Observation] The camera cuts back and forth between the normal overhead view and a top-down thermal-imaging view several times (occasional switches, as stated in the prompt); each thermal-imaging shot shows simultaneous, non-overlapping, spatially aligned thermal maps of both trays: warm-color dominance in bare soil, cool-color dominance in vegetated soil. [Phase 4: Termination] Lamp remains ON throughout the observation segment and turns OFF only after the final thermal-imaging shot ends. Visibility constraint: All phases are captured from a fixed overhead viewpoint; no occlusion; tray boundaries and vegetation coverage remain fully visible and unambiguous at all times.

Manual:
Experimental Procedure
1. Place two identical shallow trays side-by-side under a stationary heating lamp.
2. Fill left tray with bare soil (brown/gray, no cover).
3. Fill right tray with same soil, fully covered by dense green vegetation (leafy, continuous canopy).
4. Turn heating lamp ON before filming begins.
5. Record a video: begin with the overhead visible-light view, then cut back and forth to the top-down thermal-imaging view several times (occasional switches) while the lamp remains ON.
6. Turn lamp OFF after the last thermal-imaging shot ends.
Observation of Experimental Phenomena
In thermal view: bare soil tray shows dominant warm colors (yellow/red/orange); vegetation-covered tray shows dominant cool colors (blue/cyan/green) — clear side-by-side contrast.
Summary of Experimental Principles
Bare soil has low albedo and low evapotranspirative cooling → heats rapidly under radiation. Vegetation reflects more light and cools via transpiration → surface stays cooler. Same light input → divergent temperature rise due to surface property differences.

Prompt Grounding rubric:
level_1: Neither shallow tray is visible; or only one tray appears; or the trays are not shown side-by-side; or one tray isn't bare soil; or the other tray isn't covered in vegetation; or no heating lamp appears; or no top-down thermal-imaging view ever appears in the video.
level_2: Both trays appear side-by-side, but at least one of the following is missing: bare soil visible in one tray, dense green vegetation covering the soil in the other tray, a heating lamp visible above both trays, or any top-down thermal-imaging shot appearing anywhere in the video.
level_3: Two shallow trays sit side-by-side, one showing bare brown/gray soil and the other showing soil fully covered by dense green vegetation; a heating lamp is visibly positioned above both trays; at least one top-down frame shows both trays at once in thermal-imaging mode with a color-coded heat map covering both.
level_4: All conditions for the 3-score level are met, and in addition: at least one thermal-imaging shot occurs while the lamp is visibly on, and both trays stay fully visible and stationary in every thermal-imaging shot, without being blocked or moved.
level_5: All conditions for the 4-score level are met, and in addition: the lamp is switched on before the first thermal-imaging shot and switched off only after the last one; the video may cut between the normal view and the thermal view more than once, matching the prompt's occasional switches, but each thermal-imaging shot keeps the same fixed top-down framing and the same alignment of both trays.

Scientific and Causal Correctness rubric:
level_1: The thermal view shows no visible temperature difference between the two trays; or both trays display the exact same color in the thermal view; or the vegetation tray shows a hotter color than the bare-soil tray; or the color scale is reversed from the usual convention (e.g., blue shown for hot, red for cold) with nothing to indicate that.
level_2: The thermal view shows a color difference between the trays, but in the wrong direction: the bare-soil tray shows mostly cool colors (blue/cyan) while the vegetation tray shows mostly warm colors (yellow/red/orange), implying the bare soil is cooler than the vegetated soil, which is backwards.
level_3: The thermal view shows a clear contrast: the bare-soil tray is dominated by warm colors (yellow/red/orange) and the vegetation tray is dominated by cool colors (blue/cyan/green), with each color pattern staying within its own tray's boundary, matching the expectation that bare soil heats up faster and holds more heat than vegetation-covered soil under the lamp.
level_4: All conditions for the 3-score level are met, and in addition: this color contrast holds for as long as the thermal view is shown, without fading, blending together, or evening out; no stray hot spots appear outside the trays, and no halo or false-gradient effects blur the contrast between the two trays.
level_5: All conditions for the 4-score level are met, and in addition: the color gradient within each tray shifts smoothly with no abrupt internal jumps; the boundary between the two trays shows a sharp, clearly defined temperature difference that lines up with the trays' physical edge; no thermal color bleeds across the divider or into the background.

Spatiotemporal Consistency rubric:
level_1: One tray vanishes from the shot and reappears moments later; the vegetation vanishes or reappears abruptly; the soil's texture or height changes suddenly with no visible cause; the lamp flicks on and off repeatedly for no reason; the ambient lighting swaps out the lamp's light mid-video; or the trays' positions rotate or tilt inconsistently between shots.
level_2: At least one major break in continuity occurs: the trays' position shifts sideways or vertically between the normal view and a thermal-imaging shot; the vegetation's height visibly changes in a single cut; the lamp's position or angle changes between shots; or the shadows on the trays shift in a way inconsistent with a lamp that never moves.
level_3: The two trays stay side-by-side at a constant horizontal spacing with no lateral drift between shots; the vegetation continues to fully cover its tray without gaps opening or closing; the lamp stays centered and still above both trays; the shadows the lamp casts keep the same direction and shape across every shot.
level_4: All conditions for the 3-score level are met, and in addition: every cut between the normal view and a thermal-imaging shot is clean and does not disrupt the trays' alignment and spacing, with no jarring jump, no frozen or repeated moments in the footage.
level_5: All conditions for the 4-score level are met, and in addition: any camera movement follows a steady, rigid path (e.g., a smooth pan or dolly, not a shaky or floating motion); the trays' edges and the vegetation's boundary line up consistently from one frame to the next, with no visible drift in their position across the clip.