Domain: Natural Science — Atmospheric Science
Target concept: The formation of wind caused by smog flowing through a tube due to a pressure difference toward the low-pressure tank on the right.

Video generation prompt: White background, two identical transparent sealed glass jars placed side by side. The bottom of the left jar is heated, while the bottom of the right jar is placed on an ice pack. A transparent tube connects the upper parts of the two jars. Incense smoke is released into the left jar.

Evaluation guide:
(i) Target concept: Pressure-gradient-driven airflow (wind) in a controlled closed system.
Minimum mechanism: Air must be compressible and mobile; temperature differential must produce measurable pressure difference; tube must provide unobstructed path for bulk gas flow; smoke must act as passive tracer with inertia and buoyancy negligible relative to pressure force.
(ii)Storyline: Frame 1–2: Static setup, jars side-by-side, tube connected, no smoke. Frame 3–4: Smoke appears exclusively inside left jar. Frame 5–7: Smoke enters tube and moves continuously left→right. Frame 8–9: Smoke emerges from tube into right jar and accumulates in lower/mid region. Frame 10: Right jar contains visible smoke; left jar shows only residual trace. Perspective: Fixed frontal view, centered on jar pair and tube; full jars and tube always fully visible; no occlusion of tube openings or jar interiors.

Manual:
Experimental Procedure
1. Place two identical transparent sealed glass jars side-by-side on white background.
2. Heat bottom of left jar; place ice pack under bottom of right jar.
3. Connect upper parts of jars with a transparent tube.
4. Release incense smoke into left jar only.
Observation of Experimental Phenomena
Smoke flows horizontally from left jar → through tube → into right jar; accumulates in right jar without rising vertically; no smoke remains in left jar after transfer completes.
Summary of Experimental Principles
Wind forms due to pressure difference: heating creates high pressure in left jar, cooling creates low pressure in right jar; air (carrying smoke) flows from high- to low-pressure region through the tube.

Prompt Grounding rubric:
level_1: No white background is shown; the two glass jars are missing or not identical; they are not placed side by side; no tube connects their upper parts; no incense smoke is released into the left jar; no heating is visible at the left jar's base; no ice pack sits under the right jar's base.
level_2: A white background is present, and at least one sealed glass jar is visible, but the two jars are not both present and matched side by side, or the tube is present but doesn't connect their upper parts, or smoke appears but not confined to originating in the left jar, or the heating/ice-pack elements are present but on the wrong jar (e.g., heat applied to the right jar instead of the left).
level_3: A white background is present; two identical, transparent sealed glass jars sit side by side; a tube connects their upper parts; incense smoke appears inside the left jar; the left jar's base shows a visible heating cue (glow, steam, or a visible heat source), and the right jar's base visibly rests on an ice pack.
level_4: Everything described for score 3 holds, and in addition both jars are clearly the same shape and size; the tube is fully transparent and visibly bridges the upper portions of the two jars (not the middle or lower parts); no smoke is visible in the right jar before the flow begins; and the heating and ice-pack elements are unambiguously assigned to the correct jar with no shared or unclear placement.
level_5: Everything described for score 4 holds, and in addition no hands, labels, or other extraneous objects appear in the shot; both jars stay upright and motionless the whole time; the tube stays rigid and fixed in place; the smoke first appears confined entirely within the left jar; and the heating and ice-pack elements stay visible and correctly positioned throughout, without being blocked from view or flickering in and out.

Scientific and Causal Correctness rubric:
level_1: Smoke flows the wrong way, from the right jar toward the left; or smoke stays put in the left jar with no movement toward the tube; or smoke exits the tube into the open air instead of entering the right jar; or the smoke spreads evenly in all directions with no sign that a pressure difference is driving it anywhere.
level_2: Smoke appears in the left jar but never moves toward or into the tube; or it enters the tube but stalls partway without ever reaching the right jar; or it reaches the right jar but then vanishes, drifts straight up and out of frame, or behaves like a buoyant plume rising freely rather than a stream being pushed in through the tube.
level_3: Smoke starts in the left jar, travels through the tube from left to right, and enters the right jar; the flow stays continuous for as long as smoke is visible; smoke visibly builds up inside the right jar rather than merely passing through it; and there's no sign of smoke moving backward or mixing between the two jars before this flow begins.
level_4: Everything described for score 3 holds, and in addition the smoke does not rise straight up inside the left jar before heading into the tube (it moves toward the tube opening rather than forming an upward plume first); once inside the right jar, the smoke stays in the lower or middle region rather than shooting straight to the top on entry, because it is arriving as a horizontal, pressure-driven stream through the tube rather than as a free-rising plume, even though the air itself originated in the warmer left jar; no smoke leaks out of the tube along its length; and the flow visibly slows or stops once the smoke source is used up.
level_5: Everything described for score 4 holds, and in addition the smoke's path through the tube stays essentially horizontal with no upward or downward drift inside the tube itself; once in the right jar it spreads gradually toward the center and downward rather than surging upward; almost no smoke is left in the left jar once the transfer is mostly complete, aside from a faint residue near its base; and the overall sequence clearly reads as: heating the left jar raises its internal pressure, which pushes smoke into the tube and drives it into the cooler, lower-pressure right jar, where it settles.

Spatiotemporal Consistency rubric:
level_1: The left or right jar jumps to a different position between frames instead of staying fixed in place; the tube appears or disappears abruptly instead of staying connected; smoke materializes in mid-air outside either jar; the scene's lighting swings violently between frames (e.g., a flash, or a jump from black to white); either jar visibly deforms, rotates, or tilts; or the background shifts or crops unexpectedly.
level_2: A jar shifts sideways by more than its own width between frames; the tube visibly disconnects and reconnects; the smoke appears to jump by more than half the tube's length without passing through the space in between; or a highlight or shadow on a jar's surface moves from one side to the other with no camera movement to explain it.
level_3: Both jars stay side by side with the same gap between them throughout; the tube stays rigidly connected at both ends; the smoke moves continuously along its path with no jumps or gaps; the heating glow on the left jar and the ice pack on the right jar stay steady in appearance and position; and neither jar cracks, and the tube never kinks or clips through a jar wall.
level_4: Everything described for score 3 holds, and in addition the smoke's motion looks temporally smooth, with no freezing, strobing, or sudden bursts of speed; the jars' transparency and reflections look consistent throughout (no sudden opacity change or mirror-like flip); and the tube's two ends stay properly aligned with the jar openings in every frame.
level_5: Everything described for score 4 holds, and in addition there is no ghosting, inconsistent blur, or blocky compression artifact anywhere in the frame; the smoke keeps a coherent, thread-like structure as it moves rather than breaking apart into disconnected fragments; and any reflected highlight on the jars' surfaces stays fixed relative to the light source rather than sliding or pulsing.