Domain: Humanities and Social Sciences — Geography
Target concept: Tropospheric cumulonimbus (vertically developed, cotton-like) vs. Stratospheric ozone layer (blue band region in satellite images)

Video generation prompt: First, the formation and upward development of cumulonimbus clouds in the troposphere are presented. Subsequently, a satellite view of the Earth is shown, illustrating the stratospheric ozone layer surrounding the Earth.

Evaluation guide:
(i) Target concept: Vertical confinement of tropospheric convection beneath stratospheric ozone layer.
Minimum mechanism: Cloud must be visually anchored to troposphere (surface-proximal, textured, convective), while ozone layer must be visually anchored to stratosphere (limb-localized, smooth, circumferential, blue).
(ii)Storyline: Frame 1–3: Ground-relative view showing cumulonimbus initiating and growing upward with increasing vertical extent and cotton-like texture. Frame 4–7: Seamless transition to orbital perspective: Earth disk enters frame, cloud recedes into surface detail, and blue band emerges at upper limb. Frame 8–10: Stable full-disk view highlighting spatial separation: cloud features confined to lower hemisphere, blue band exclusively at curved edge; no overlap, no ambiguity in layer assignment. Perspective remains fixed (no camera tilt/roll), visibility ensures simultaneous legibility of both phenomena in final composite or sequential clarity.

Manual:
Experimental Procedure
1. Show close-up of vertically developing, cotton-like cumulonimbus cloud rising from Earth surface.
2. Transition to full-disk satellite view of Earth, revealing continuous blue band encircling planetary limb.
Observation of Experimental Phenomena
- Cumulonimbus appears as dense, cauliflower-shaped, vertically towering mass with sharp-edged turrets.
- Blue band appears exclusively at Earth's upper atmospheric limb, smooth and unbroken, contrasting sharply with black space and clouded surface.
Summary of Experimental Principles
- Cumulonimbus develops vertically within the troposphere (surface up to roughly 12 km); its growth is capped near the tropopause, where the cloud top typically flattens into an anvil rather than continuing upward (only rare, severe storms produce brief overshooting tops that push a short distance into the lowermost stratosphere).
- The stratospheric ozone layer (~15–35 km altitude) is represented here by the thin blue band conventionally seen at Earth's limb in satellite imagery; this blue color is actually produced by Rayleigh scattering of sunlight across the whole atmospheric column (mainly nitrogen and oxygen molecules) rather than being a direct optical signature of ozone concentration, so the band should be understood as a schematic marker for the stratospheric altitude region rather than a literal photograph of the ozone layer itself.

Prompt Grounding rubric:
level_1: Neither a cumulonimbus cloud nor a satellite view of Earth's blue limb band is shown; there is no cloud-development phase and no orbital Earth shot at any point in the video.
level_2: Only one of the two required scenes appears (either the cumulonimbus growth shot or the satellite Earth view, but not both), or both appear in the wrong order (satellite view precedes cloud growth), or the cloud is flat/wispy rather than a tall convective tower, or the satellite view lacks any blue band around Earth's edge.
level_3: Both a vertically-developing, billowing cumulonimbus cloud and a satellite full-disk view of Earth with a blue limb band are shown, in the order cloud-growth-then-satellite-view, but the two are presented as fully separate, unrelated shots with no visual cue connecting their relative altitude or scale.
level_4: All elements from score 3 are present AND the cloud and the blue band are shown within a shared visual frame or an explicit height-comparison cut (e.g., a composite or a continuous zoom-out) so that the cumulonimbus clearly sits low relative to the blue band that traces Earth's edge; no reordering of the two phases and no contradictory placement (blue band never appears below or intermixed with the cloud).
level_5: All elements from score 4 are present AND the cloud's growth phase visibly terminates before the transition to the satellite view, and the final composite unambiguously contrasts the cumulonimbus (localized, textured, close to Earth's surface) with the blue band (continuous, following Earth's curvature, at the outer edge of the disk), matching the prompt's cloud-then-satellite-view structure.

Scientific and Causal Correctness rubric:
level_1: The cumulonimbus is shown with no vertical growth dynamic (e.g., a static cotton-ball shape that never develops upward, or already fully formed with no growth phase), and/or the blue limb band is depicted as a random colored haze unrelated to atmospheric layering (e.g., a rainbow-tinted ring or a green/white smog patch); no scientific relationship between the two phenomena is implied.
level_2: Cumulonimbus growth is shown but with implausible physics (e.g., the cloud shoots straight up as a narrow spike rather than broadening into billowing convective towers, or forms instantly with no updraft-driven growth phase), OR the blue band's color/position contradicts basic atmospheric science (e.g., it appears to originate from ground-level smog/haze rather than the outer atmosphere, or sits at a clearly implausible altitude such as touching the ocean surface).
level_3: The cumulonimbus broadens and thickens as it rises, consistent with moist convective updraft behavior, and its growth visibly slows or flattens as it approaches its upper limit rather than continuing indefinitely; the blue band is depicted as a feature of the outer atmosphere at the edge of the Earth disk, consistent with a stratospheric ozone layer, but the tropopause-boundary relationship between the two is not explicitly reinforced.
level_4: All elements from score 3 are present AND the cumulonimbus top is shown leveling off or spreading laterally (anvil-like) well below the blue band, correctly implying that ordinary convective growth is capped near the tropopause and does not reach the stratosphere; the blue band is rendered as a continuous atmospheric layer (not a sharp geometric line or opaque solid ring), consistent with a scattering-based optical phenomenon rather than a solid boundary.
level_5: All elements from score 4 are present AND the depicted physics is fully consistent with atmospheric science: the cumulonimbus anvil spreads and flattens near its ceiling rather than piercing through the blue band (severe overshoot into the stratosphere is a real but exceptional phenomenon and is neither required nor contradicted here), and the blue band's appearance (soft-edged and gradient rather than a hard, knife-edge line, with uniform hue) is consistent with it arising from atmospheric light scattering rather than being drawn as a painted-on solid stripe; the depiction correctly conveys that tropospheric weather and the stratospheric ozone layer occupy distinct, non-overlapping altitude regimes.

Spatiotemporal Consistency rubric:
level_1: The video cuts abruptly between an unrelated cloud shot and an unrelated Earth shot with no visual bridge; the cumulonimbus changes shape, size, or position between frames with no continuous growth motion; the Earth disk or blue band appears fully formed in a single frame with no camera movement leading into it.
level_2: The cumulonimbus grows in a jerky, non-continuous way (its height jumps between frames rather than rising smoothly), or the camera viewpoint snaps between the ground-level shot and the orbital shot without any perceptible camera motion or dissolve; Earth's limb curvature or rotation visibly changes inconsistently from one frame to the next.
level_3: The cumulonimbus rises with mostly continuous, gradual motion during its growth phase, and the shift to the satellite view happens through a single clear transition (cut, dissolve, or zoom) rather than multiple jarring cuts; minor unevenness in growth speed or a brief hesitation at the transition is acceptable as long as no object suddenly relocates or changes shape mid-frame.
level_4: All elements from score 3 are present AND the cumulonimbus growth is smooth and physically plausible throughout (steady upward billowing, no shrinking or flickering between frames), the transition into the satellite view preserves a consistent sense of camera movement or framing, and the blue band's curvature and position around Earth stay stable and continuous once the satellite view begins, without shifting size or wobbling.
level_5: All elements from score 4 are present AND lighting on the cloud and on the Earth disk stays plausible and consistent with a single implied light source across both phases (no sudden shift from bright daylight cloud footage to a differently-lit Earth view), Earth's rotation or camera orbit (if any) proceeds at a steady, continuous rate, and the blue band remains anchored to the limb throughout with no flicker, gap, or duplication.