Domain: Humanities and Social Sciences — Geography
Target concept: Cyclone: Northern Hemisphere cyclone (counterclockwise rotation, cloud system) and Southern Hemisphere cyclone (clockwise rotation, cloud system)

Video generation prompt: The image side by side shows two schematic diagrams of cyclones, with the one on the left representing a northern hemisphere cyclone and the one on the right representing a southern hemisphere cyclone, clearly labeled with their respective hemispheres. Clear arrows indicate each cyclone's rotation direction.

Evaluation guide:
Target concept: Hemispheric dependence of cyclonic rotation due to Coriolis deflection, a fundamental geophysical principle requiring no external forces or fluid dynamics simulation, only correct schematic representation. Minimum mechanistic assumption: Earth’s rotation induces apparent rightward (NH) / leftward (SH) wind deflection, resulting in opposite large-scale vorticity. Expected phased storyline: (1) Frame opens to symmetrical side-by-side blank schematics; (2) Labels ‘Northern Hemisphere’ (left) and ‘Southern Hemisphere’ (right) appear simultaneously and remain fixed; (3) Counterclockwise arrow draws smoothly along left spiral cloud band; (4) Clockwise arrow draws smoothly along right spiral cloud band, both arrows completing within ≤1.5s and remaining visible; (5) Final stable frame displays both labeled diagrams with fully drawn, directionally faithful arrows coiled with cloud bands. Visibility constraint: Must be legible at 720p resolution; no occlusion; labels and arrows must survive aggressive compression; perspective is strictly frontal (no tilt/foreshortening).

Manual:
I. Basic Demonstration Information
Demonstration Title: Northern vs. Southern Hemisphere Cyclone Rotation Direction Demonstration
Subject: Geography - Atmospheric Science - Cyclonic Systems
Demonstration Purpose: To visually contrast the opposite rotational senses of cyclones in the two hemispheres using side-by-side schematic diagrams; to reinforce the Coriolis-effect-driven principle that NH cyclones rotate counterclockwise and SH cyclones rotate clockwise; and to train visual recognition of labeled hemisphere identity and kinematically aligned curved arrows as diagnostic features.
II. Demonstration Carrier/Equipment
Core Carrier: Two static schematic cyclone diagrams (vector-based, high-contrast black-on-white or blue-on-white), rendered side-by-side in fixed left–right orientation.
Auxiliary Equipment: None — pure schematic illustration; labels and arrows are integral vector elements, not overlays.
III. Demonstration Content Description
Layout: Strict left–right arrangement — left diagram labeled ‘Northern Hemisphere’, right diagram labeled ‘Southern Hemisphere’, both in bold, centered, legible font below respective diagrams.
State Control: Both diagrams display identical spiral cloud band structure (3–5 concentric curved arms converging inward); each features a single continuous curved arrow tracing the innermost cloud arm — left arrow curving counterclockwise (from 3 o’clock → 12 o’clock → 9 o’clock), right arrow curving clockwise (from 3 o’clock → 6 o’clock → 9 o’clock).
Comparison Baseline: Diagrams must be geometrically congruent (same size, same center point relative to frame, same line thickness, same spiral pitch) — only rotation direction and hemisphere label differ.
IV. Observation of Core Phenomena
NH Cyclone Visual Signature: Left-side diagram with ‘Northern Hemisphere’ label; arrow begins at eastern edge and sweeps upward then leftward in smooth counterclockwise arc; cloud bands coil identically along that arc.
SH Cyclone Visual Signature: Right-side diagram with ‘Southern Hemisphere’ label; arrow begins at eastern edge and sweeps downward then leftward in smooth clockwise arc; cloud bands coil identically along that arc.
Characteristic Stability: No element changes state (no animation beyond arrow drawing sequence); labels remain fixed and legible; arrow curvature is mathematically precise — no straight segments or kinks.
Auxiliary Comparison: Identical styling eliminates confounding variables — differences are *only* hemisphere label and arrow direction, enabling unambiguous visual discrimination.
V. Summary of Key Knowledge Points and Principles
Core Concept Definition: Cyclones are low-pressure atmospheric systems whose horizontal wind circulation is deflected by the Coriolis effect — causing counterclockwise rotation in the Northern Hemisphere and clockwise rotation in the Southern Hemisphere.
Principle of Visual Feature Recognition: Diagnostic verification relies on three simultaneous features: (1) strict left–right spatial mapping (NH always left, SH always right), (2) unambiguous hemisphere labeling (full words, not abbreviations), and (3) kinematically coherent curved arrows whose direction matches the hemisphere’s expected rotation — with cloud bands visually locked to arrow trajectory.

Prompt Grounding rubric:
level_1: No side-by-side pair of cyclone diagrams appears at all: the frame shows only a single diagram, real satellite imagery, plain text, or an unrelated scene. Neither a 'Northern Hemisphere' nor a 'Southern Hemisphere' label appears, and no rotation arrow is drawn on either side.
level_2: Two diagrams appear but the setup is badly broken: both panels carry the same hemisphere label (e.g., both say 'Northern Hemisphere'), or one panel has no label at all, or one panel has no rotation arrow, or the two diagrams are stacked vertically or overlapping instead of placed side by side.
level_3: Two diagrams sit side by side, the left panel labeled for the Northern Hemisphere and the right panel labeled for the Southern Hemisphere; each panel contains one curved rotation arrow and a spiral cloud band, but the labels are hard to read (tiny font or abbreviated to 'NH'/'SH') or the two panels are noticeably different in size.
level_4: The left panel is clearly labeled 'Northern Hemisphere' and the right panel 'Southern Hemisphere' in legible text; each panel shows one smoothly curved rotation arrow spanning at least a 90° arc and a spiral cloud band; the two panels match closely in size and line style, with only a minor cosmetic flaw such as uneven arrow thickness or a slightly offset label.
level_5: Two visually matched panels are arranged strictly left-right: the left panel is bold-labeled 'Northern Hemisphere' and the right panel bold-labeled 'Southern Hemisphere'; each panel shows one smooth, unbroken curved arrow spanning at least 180° of arc and a matching spiral cloud band that follows the arrow's curvature; the panels are identical in size, line weight, and font, with no overlapping text, occlusion, or stray objects in frame.

Scientific and Causal Correctness rubric:
level_1: Rotation direction contradicts the Coriolis effect for at least one hemisphere in a way that inverts the whole picture: e.g., the Northern Hemisphere panel's arrow turns clockwise, or the Southern Hemisphere panel's arrow turns counterclockwise, or both panels' arrows turn the same direction as each other; nothing about the cloud bands or arrows visually connects rotation sense to hemisphere.
level_2: Exactly one of the two panels shows the physically correct rotation (Northern Hemisphere arrow turning counterclockwise, or Southern Hemisphere arrow turning clockwise), while the other panel's arrow turns the wrong way for its labeled hemisphere; the cloud bands in both panels look identical regardless of hemisphere, so there is no visual distinction beyond the partly-wrong arrows.
level_3: The Northern Hemisphere panel's arrow turns counterclockwise and the Southern Hemisphere panel's arrow turns clockwise, matching real Coriolis-driven cyclone rotation; each panel's spiral cloud band is present, but the cloud band does not clearly follow the arrow's path (e.g., the cloud spiral looks static while only the arrow appears to move), so the rotation reads more like a labeled diagram than a depicted flow.
level_4: Both hemispheres show the scientifically correct rotation (Northern Hemisphere counterclockwise, Southern Hemisphere clockwise), and in each panel the spiral cloud band visibly winds along the same curved path as its arrow, so the cloud bands themselves read as rotating inward with the arrow rather than as a separate static backdrop.
level_5: Rotation direction is exclusively and correctly tied to hemisphere with no ambiguity (Northern Hemisphere counterclockwise, Southern Hemisphere clockwise); in both panels the spiral cloud arms visibly spiral tighter as they approach the center, and the arrow's curvature tracks that same tightening spiral pitch, so the cyclone's inward-spiraling structure is legible from the cloud shape alone, not just from the arrow.

Spatiotemporal Consistency rubric:
level_1: Layout breaks down over time: the left and right panels swap positions mid-video, a hemisphere label jumps to a different spot partway through, one arrow appears then vanishes and reappears, or the two panels end up at clearly different scales (e.g., one cyclone diagram roughly three times larger than the other).
level_2: Panels stay side by side but the animation is visibly unstable: one panel drifts sideways while the other stays put, one arrow's curve direction changes partway through being drawn, the cloud bands in the two panels fade in and out at different times, or the second arrow starts drawing well before the first hemisphere's label has even appeared.
level_3: The left and right panels hold their positions and relative sizes for the whole video; both arrows draw along a continuous curved path without stalling or restarting; each panel's cloud band is fully drawn in before its arrow starts animating; a minor timing gap between the two panels (e.g., one label fading in noticeably later than the other, or one arrow finishing a beat before the other) does not affect readability.
level_4: The panels match in size, arrow stroke weight, and overall visual weight for the entire video; the labels stay anchored in the same spot under each panel throughout; both arrows draw over roughly the same duration and pace so neither panel visibly finishes well ahead of the other; the cloud bands stay consistent in line thickness and spiral tightness between the two panels; no jitter or drift appears in either panel's position.
level_5: Left-right symmetry is maintained throughout, with a clean vertical centerline between the two matched panels; the labels, arrows, and cloud bands hold steady position without visible drift or flicker; the two arrows' drawing animations run in close synchrony, finishing at essentially the same time; each arrow's curvature visibly increases its swept angle smoothly, moving from a small arc toward a nearly complete loop rather than jumping between fixed positions; no stutter, freeze, or visible frame repeat occurs anywhere in the video.