Domain: Engineering — Energy Engineering
Target concept: Direct Solar Radiation Heating Comparison between Asphalt Pavement and Lawn (Infrared View)

Video generation prompt: Fixed infrared cameras captured two adjacent surfaces under noon sunlight: the left one was a dark asphalt pavement, and the right one was a green lawn, recording their temperature changes over time.

Evaluation guide:
(i) Target concept: Differential solar heating due to surface albedo and thermal properties under direct insolation.
Minimum mechanism: Asphalt and lawn must be dry, exposed, unshaded, and at thermal equilibrium phase (i.e., sufficient time under sun to develop measurable divergence); infrared camera must render temperature as false-color with warm/cool polarity preserved.
(ii)Storyline: Frame opens on static wide shot of adjacent surfaces under bright overhead sun → asphalt and lawn fully visible, aligned horizontally, no occlusion → thermal contrast initiates within first 2 seconds (asphalt warms faster) → contrast intensifies steadily → peak divergence sustained through final 5 seconds → no interruption, no external interference, no lighting shift; viewer perspective is eye-level fixed camera, orthogonal to surface plane, capturing full thermal field without parallax.

Manual:
Experimental Procedure
1. Position fixed infrared camera facing south at solar noon.
2. Frame two adjacent ground surfaces side-by-side: left = dry asphalt pavement, right = healthy green lawn.
3. Record continuously for 10 seconds.
Observation of Experimental Phenomena
Asphalt surface displays warmer infrared signature (e.g., orange/red false-color) while lawn displays cooler signature (e.g., blue/green false-color); difference is visible throughout and increases gradually.
Summary of Experimental Principles
Asphalt has low albedo and a relatively low specific heat capacity, so it absorbs most incident solar radiation and that absorbed energy produces a large, rapid rise in surface temperature; it also has no evaporative cooling to offset the heating. Lawn has higher albedo (reflecting more incoming sunlight), and evapotranspiration from grass blades and soil moisture removes energy as latent heat, keeping its surface cooler and slowing its temperature rise. Infrared imaging visualizes this differential surface temperature.

Prompt Grounding rubric:
level_1: The dark asphalt pavement or the green lawn is missing from the shot, or only one surface appears; or the two surfaces are not shown side by side in the same frame (e.g., stacked one above the other, or shown in separate cuts); or the camera pans, zooms, or repositions instead of holding a fixed frame; or the scene shows nighttime, overcast sky, or an indoor setting instead of bright noon sunlight.
level_2: Either the asphalt pavement or the lawn is present and identifiable by its surface texture/shape (smooth paved surface vs. turf/grass blades) in the video's thermal rendering, while the other is missing, unidentifiable, or positioned so it is not adjacent to its counterpart (separated by a visible gap wider than either surface, or placed in a different shot). The camera holds a fixed viewpoint, but the side-by-side layout required by the prompt is not achieved.
level_3: Both the asphalt pavement and the lawn are visible side by side in one continuous shot, under bright overhead sunlight consistent with solar noon (short, near-vertical shadows and even ambient brightness), filmed with a fixed, unmoving frame; in the infrared camera's rendering, the asphalt is identifiable by its flat, paved texture/shape and the lawn by its grass texture/shape, with no swapped positions, missing surface, or incorrect count of surfaces.
level_4: Everything required at the 3-point level holds, and in addition: the asphalt-lawn boundary is unobstructed by any object or shadow that hides the adjacency; the two surfaces occupy roughly comparable width in frame (neither surface is more than about twice as wide as the other); and the fixed shot shows each surface's full extent without either edge being cropped out of frame.
level_5: Everything required at the 4-point level holds, and in addition: the asphalt's paved texture/shape is uniform, with no unexplained gaps, glare, or wet-looking sheen; the lawn's turf texture/shape is uniform, with no large bare-soil patches or an artificially uniform pattern that would suggest it is not real grass; the two surfaces share the same bottom edge/ground line with no vertical offset between them; and no unrelated object (person, vehicle, tool, or shadow-casting structure) intrudes into the frame at any point in the clip.

Scientific and Causal Correctness rubric:
level_1: No temperature-difference effect is shown at all — the asphalt and the lawn display the same false-color hue/brightness in the infrared view, or the view is not color-coded for temperature at all; or the lawn appears warmer (redder/brighter) than the asphalt; or the scene shows a physically backwards state (e.g., the lawn steaming while the asphalt looks cold, or dew forming on the asphalt while the lawn looks hot).
level_2: Only one surface shows any thermal false-color signature while the other stays a flat, unchanging gray/neutral tone; or both surfaces show a color shift but with the asphalt cooler-colored than the lawn (reversed contrast); or the color change appears as an instantaneous switch rather than building up gradually as the clip proceeds.
level_3: Across the clip, the asphalt consistently reads as the warmer surface in false color (e.g., orange/red/yellow tones) while the lawn consistently reads as the cooler surface (e.g., blue/green/purple tones), matching asphalt's greater solar absorption; this warm/cool contrast holds for the full duration shown, with no point where the two surfaces swap or the contrast disappears.
level_4: Everything required at the 3-point level holds, and in addition: the warm asphalt coloring and cool lawn coloring are both already visible within roughly the first couple of seconds rather than appearing only near the end; the contrast holds steady without visibly flickering or dropping out partway through; and each surface's false-color tone changes gradually across its area rather than jumping between disconnected color patches.
level_5: Everything required at the 4-point level holds, and in addition: the asphalt's warm coloring covers essentially the whole pavement (no cool-toned patch covering more than about a quarter of its area) and the lawn's cool coloring covers essentially the whole lawn (no warm-toned patch covering more than about a quarter of its area); the line where the warm asphalt tone meets the cool lawn tone reads as a narrow, distinct edge rather than a wide smeared gradient; and the false-color rendering looks clean, without rainbow speckling, blocky artifacts, or color fringing distorting the thermal read.

Spatiotemporal Consistency rubric:
level_1: A severe spatiotemporal break occurs: e.g., the fixed camera's framing of the asphalt-lawn boundary suddenly jumps to a different horizontal position between two frames even though no pan or tilt is shown; or the short noon-time shadow along the asphalt/lawn edge vanishes in one frame and reappears in the next pointing in a clearly different compass direction with no gradual swing; or either surface visibly tears, warps, or fragments; or the recording jump-cuts, skipping more than roughly a second of the sequence.
level_2: A moderate break occurs: the frame flickers to black or blank for several frames; the overall image brightness jumps sharply (roughly halves or doubles) within one or two frames without a plausible cause; a shadow or dark patch appears or disappears on one of the surfaces with no object present to cast or remove it; or the asphalt or lawn surface ripples or bulges as if it were flexible, which is inconsistent with a static outdoor scene.
level_3: The asphalt and lawn stay fixed and rigid in the frame throughout, with no teleporting, tearing, or jump cuts; the short, near-vertical shadows at the asphalt-lawn boundary keep pointing in the same direction and keep roughly the same length from the first frame to the last, consistent with the sun barely moving during a 10-second solar-noon clip; any grass movement is limited to gentle, continuous swaying rather than abrupt shifts.
level_4: Everything required at the 3-point level holds, and in addition: the camera frame shows no perceptible shake, drift, or wobble over the full clip; background elements (if any, such as a curb, fence, or tree line) stay in the same position relative to the asphalt and lawn with no parallax mismatch; and the grass texture shows no distracting shimmering or flicker as the camera holds still.
level_5: Everything required at the 4-point level holds, and in addition: the overall brightness of the scene looks steady from start to finish with no perceptible flicker or pulsing; the shapes of the asphalt and lawn areas show no stretching, bowing, or warping at any point; and the grass blades and asphalt texture keep a consistent look and density throughout, with no surface pattern suddenly changing or resetting.