Domain: Natural Science — Physics
Target concept: Series connection

Video generation prompt: A battery power supply, an LED lamp, and a single-pole switch are connected in series on the table, with the switch initially open. Pressing the single-pole switch closes the circuit.

Evaluation guide:
(i) Target concept: Electrical continuity in a DC series circuit governed by mechanical switch state.
Minimum mechanism: A functional battery must provide sufficient voltage (>1.8V for red LED); LED must be forward-biased (anode to battery +, cathode to – via switch); switch must physically bridge two terminals to close the loop; no short-circuit or open-circuit faults in wiring.
(ii)Storyline: [Frame 0–2] Static setup: battery, switch, LED aligned linearly on tabletop, all unlit, switch in open (upright) position. [Frame 3–5] Finger enters frame and makes contact with switch actuator. [Frame 6–8] Switch depresses fully; LED transitions from unlit to lit state within same continuous motion. [Frame 9–10] If release shown: finger lifts, switch returns to open position, LED transitions from lit to unlit within same continuous motion. Perspective: fixed frontal view, eye-level to tabletop, no camera movement, full setup always in frame.

Manual:
Experimental Procedure
1. Place a battery, an LED lamp, and a single-pole switch side-by-side in a straight line on a tabletop.
2. Connect them sequentially with wires: battery terminal → switch input → switch output → LED lead → battery return terminal.
3. Press the switch actuator firmly until fully depressed.
Observation of Experimental Phenomena
The LED lamp emits visible light only while the switch is fully pressed; it is unlit before pressing and extinguishes immediately upon release.
Summary of Experimental Principles
In a series circuit, current flows only when the path is complete. The single-pole switch controls continuity: open = no current = LED off; closed = current flows = LED emits light.

Prompt Grounding rubric:
level_1: Fewer than two of the three core components (battery, LED lamp, single-pole switch) are visible on the tabletop, or any visible component is misidentified (e.g., the LED drawn as a plain frosted bulb, or the switch shown as a knob with no lever or button to press), or no tabletop surface appears in the shot.
level_2: All three components appear somewhere in the frame, but at least one is only partially visible or ambiguous in identity (e.g., the switch has no visible actuator to press), or they are arranged in a non-linear layout (piled together, stacked, or scattered with no implied wiring path between them), or no finger or stylus ever approaches the switch at any point.
level_3: The battery, LED lamp, and single-pole switch are each clearly visible and identifiable, laid out end-to-end on the tabletop in the order stated in the prompt, and a finger or stylus is shown contacting and depressing the switch actuator; however the video does not clearly distinguish a moment before the press (switch open) from the moment of the press (switch closed).
level_4: Beyond level 3, the video also shows a clear open-switch moment before the finger arrives, followed distinctly by the press itself, while the battery, LED lamp, and switch keep the same relative layout across the whole sequence (no component sliding to a new spot, duplicating, or disappearing).
level_5: Beyond level 4, the wiring connecting battery to switch to LED and back to the battery is drawn as one unbroken path with no gaps or crossed-out segments, no unrelated objects (extra tools, a second hand, stray wires) enter the frame, and the camera keeps one static, frontal framing with all three components fully visible throughout, never zooming, panning, or cropping any of them out.

Scientific and Causal Correctness rubric:
level_1: The LED lamp never lights at any point in the video, or it stays lit continuously regardless of whether the switch is pressed, or it turns on before the finger begins pressing the switch, or the LED emits a color inconsistent with a standard indicator LED, such as pure white or blue, with no such color specified in the prompt.
level_2: The LED lights up, but stays illuminated for a noticeable period after the switch is released instead of turning off, or it turns on only after a visible delay following the press or flickers on and off more than once during a single press, or the visible leads suggest reversed polarity, such as the LED's marked terminals both connecting to the battery's positive side.
level_3: The LED stays unlit while the switch is open, turns on essentially as soon as the switch is pressed and stays lit for the duration of the press, and turns off promptly if the switch is released; its color is a plausible indicator hue (red, yellow, or green) with no white or blue tint, and nothing in the visible leads suggests reversed polarity.
level_4: In addition to level 3, the LED turns on only once per press with no double-flashing or strobing, no secondary phenomenon such as sparking, smoke, or visible overheating appears at the LED or battery, and the LED's brightness stays steady rather than pulsing or surging while lit.
level_5: Beyond level 4, the LED's transition to lit begins within the same continuous shot as the press with no cut hiding the transition, its transition to unlit (if release is shown) likewise happens within the same continuous shot as the release, no glow or overexposure blooms large enough to obscure whether it is actually on or off, and its housing keeps a plausible, unchanging bulb or lens shape throughout.

Spatiotemporal Consistency rubric:
level_1: The battery, LED lamp, or switch vanishes from the frame or appears in a new spot with no visible motion carrying it there, the wiring between components disappears in one frame and reappears in the next, the room's overall brightness swings noticeably darker then brighter with no visible cause, the switch or LED body suddenly stretches, tilts, or warps out of its normal shape, or the tabletop surface itself splits, warps, or otherwise breaks continuity.
level_2: A component drifts slightly (less than about one component's width) out of its established spot between frames with no clear cause, the shadows the components cast shift direction or softness from one frame to the next while the lighting looks unchanged, the scene's brightness visibly flickers up and down, or a wire segment looks connected in one frame and visibly gapped in the next with no object moving to explain it.
level_3: The battery, LED lamp, and switch stay in the same positions and orientations for the whole sequence, the wiring between them looks continuous in every frame, the shadows they cast keep a consistent direction and softness, the overall lighting stays even without sudden shifts, and none of the three components bends, stretches, or otherwise loses its normal shape.
level_4: Beyond level 3, the finger's approach to and press of the switch moves smoothly along a plausible hand trajectory rather than jumping or floating into position, no frame is blurred enough to make it unclear whether the LED is lit or unlit, and the spacing between battery, switch, and LED looks the same from the camera's fixed vantage point in every frame.
level_5: Going beyond level 4, every frame shows a physically continuous step of the finger's approach, contact, and press with no pose skipped or repeated, none of the three components shows ghosting or smearing that blurs their edges, and the front-to-back layering of finger, switch, and wiring stays consistent (the finger always in front of the switch, wires always behind the switch body) throughout.