Domain: Natural Science — Atmospheric Science
Target concept: Cigarette smoke rises along the sun-heated inclined plate (upslope wind)

Video generation prompt: A sloped wooden board is heated by direct sunlight, with a stick of incense ignited at its lower end.

Evaluation guide:
(i) Target concept: Upslope wind generation via differential surface heating.
Minimum mechanism: Sunlight must illuminate the board surface to induce localized heating; the board must be thermally conductive enough to warm boundary-layer air; incense smoke must act as a passive tracer of that buoyant flow; gravity and slope must jointly define the direction of net mass transport (uphill along surface).
(ii)Storyline: [Phase 1] Static setup: inclined wooden board under steady sunlight, incense lit at lower end; full board and incense base visible, no smoke yet. [Phase 2] Ignition & onset: smoke emerges from incense tip and makes immediate contact with board surface. [Phase 3] Sustained ascent: smoke advances continuously uphill, maintaining surface adhesion and coherent structure. [Phase 4] Exit or fade: smoke reaches upper board edge and either lifts off or dissipates, with no reversal, stalling, or lateral escape. [Perspective constraint] Fixed frontal or slightly oblique viewpoint capturing full board length, incense base, and entire smoke path; no occlusion; lighting consistent with overhead-forward sun angle.

Manual:
Experimental Procedure
1. Place a dry wooden board at a shallow incline (≈15–30°) in direct sunlight.
2. Position a burning incense stick upright at the lower end of the board.
3. Observe smoke motion for ~10 seconds.
Observation of Experimental Phenomena
Smoke rises continuously along the board surface from the lower end toward the upper end, remaining in contact with the surface without detaching or drifting sideways.
Summary of Experimental Principles
Sunlight heats the board surface, warming adjacent air; less-dense warm air flows upslope (analogous to valley breeze), carrying smoke with it — demonstrating upslope wind driven by surface heating.

Prompt Grounding rubric:
level_1: No sloped wooden board is present; no incense stick is visible; there's no sunlight illuminating the board; the scene doesn't show an incline with an incense stick placed at its base.
level_2: A wooden board is present but is flat rather than sloped; or an incense stick is present but isn't positioned at the low end of an incline; or the board isn't visibly lit by sunlight (e.g., indoor lighting only, or sitting in shadow).
level_3: A visibly sloped wooden board sits in direct sunlight; a stick of incense is placed and lit at the board's lower end; smoke is present somewhere in the scene. All the core objects and their basic placement from the prompt appear together in one shot.
level_4: All of 3 is met, AND the incense sits right at the base of the incline, not partway up or off to the side; the board is unmistakably wood (not metal, glass, or plastic) with a single, uniform slope; the sunlight direction and board orientation stay consistent throughout the clip; no extra board, incense stick, or light source appears mid-video.
level_5: All of 4 is met, AND the incense is a single standard stick (not a coil or cone); the full length of the board and the incense base stay visible within one fixed camera framing for the whole clip; no hands, tools, or unrelated objects intrude on the setup at any point.

Scientific and Causal Correctness rubric:
level_1: Smoke moves downward, sideways, or lifts straight up away from the board instead of following its slope; the board shows no visible sign of being lit by direct sunlight; nothing visibly connects the sunlit board to how the smoke moves.
level_2: Smoke rises, but it drifts away from the board rather than following its surface, or its direction doesn't match what heating would produce: e.g., it flows downhill, or wanders with no consistent uphill drift.
level_3: Smoke rises continuously from the incense tip toward the top of the incline, staying close to the board's surface as it goes; the board is lit by direct sunlight; smoke traveling uphill along a sun-warmed surface reads as a coherent cause-and-effect sequence.
level_4: All of 3 is met, AND the smoke never reverses direction, stalls, or drifts off partway up the slope; there's no sign of a competing draft or breeze disturbing the plume; the smoke keeps hugging the board's surface all the way until it reaches the top edge, rather than lifting away partway.
level_5: All of 4 is met, AND the smoke visibly hugs the board's surface with no noticeable lift-off at any point along its climb, and it appears to thicken or quicken slightly as it nears the top, consistent with warm air accelerating as it moves upslope; nothing in the shot (odd puffs, sudden direction changes) contradicts the smoke behaving like a tracer riding the warmed air layer.

Spatiotemporal Consistency rubric:
level_1: The board's shape changes abruptly (it warps, rotates, or disappears) between frames; the incense jumps to a new position; smoke appears or disappears instantly with no visible emission or fade; the sunlight's direction or intensity jumps discontinuously; the camera cuts or repositions mid-clip.
level_2: The board stays in place but looks subtly warped or distorted; the incense stays at the base but tilts or shifts erratically then snaps back; the smoke plume skips frames, strobes, or suddenly changes thickness; the shadow edges on the board jump or vanish between frames.
level_3: The board stays rigid and fixed in place the whole time; the incense stays exactly where it was placed at the base; smoke leaves the tip continuously and climbs smoothly, without vanishing, splitting apart, or skipping ahead in time; the sunlight and the shadows it casts on the board look consistent with a single steady light source throughout.
level_4: All of 3 is met, AND the smoke's motion looks temporally smooth with no stutter, freeze-frame, or sudden speed change; the wood grain and texture on the board look the same from frame to frame; the incense's ember glows steadily rather than flickering; nothing about the board or incense appears to shift or shear out of alignment between frames.
level_5: All of 4 is met, AND the sharpness of the smoke and board edges matches how fast they're moving, with no inconsistent blur; the camera's focus stays fixed on the board's surface throughout; no lens flare or color fringing breaks the scene's realism; the smoke never appears to pass behind or in front of something that isn't actually there.