Domain: Natural Science — Physics
Target concept: Specific heat capacity

Video generation prompt: Two beakers are placed side by side on the table, each beaker positioned above its own alcohol lamp; the left beaker contains water, while the right beaker contains an equal mass of oil. Each beaker has a thermometer immersed in the liquid inside. Both alcohol lamps are ignited simultaneously, and both beakers are heated for the same duration until the thermometer readings show a significant change.

Evaluation guide:
(i) Target concept: Specific heat capacity determines temperature change under equal energy input.
Minimum mechanism: Identical mass of water and oil, identical heat source intensity and duration (one alcohol lamp positioned directly beneath each beaker, not a single flame shared between them), no phase change, no heat loss disparity, liquids remain thermally stable (no convection dominance masking conduction), thermometer response time negligible relative to video duration.
(ii)Storyline: Frame 0–1: Static setup. Two beakers side-by-side, filled to the same level, thermometers immersed, two unlit alcohol lamps positioned directly beneath each beaker. Frame 2–3: Both flames ignite together; visible yellow-orange flames appear steadily beneath each beaker. Frame 4–8: Continuous heating. Both thermometer columns rise gradually; the right column (oil) advances visibly farther than the left column (water); liquids remain still, clear, and non-boiling. Frame 9–10: Stable endpoint. Both flames still burning, both columns static at their final heights with the right column higher than the left; no motion, no flicker, full visibility of all elements from a fixed frontal view.

Manual:
Experimental Procedure
1. Place two identical beakers side-by-side on a table.
2. Fill the left beaker with water and the right beaker with an equal mass of oil, both to identical levels.
3. Insert one thermometer fully into each beaker, ensuring the bulb is submerged.
4. Position two identical alcohol lamps, one centered directly beneath each beaker.
5. Ignite both lamps at the same moment and heat both beakers for the same fixed duration.
Observation of Experimental Phenomena
After heating, the right thermometer (oil) shows a higher temperature reading than the left thermometer (water), despite equal mass and identical heating time and source intensity.
Summary of Experimental Principles
Water has a higher specific heat capacity than oil, so it requires more energy to raise its temperature by the same amount. For equal mass and equal heat input, water's temperature rises less than oil's temperature.

Prompt Grounding rubric:
level_1: Fewer than two beakers are shown, or no alcohol lamp is visible under either beaker, or a thermometer is missing from one or both beakers, or the two beakers are not placed side by side on the same tabletop, or neither flame is ever ignited, or no heating action is depicted at all.
level_2: Two beakers are shown side by side, but at least one required element is missing or wrong: only one alcohol lamp appears instead of one beneath each beaker, a thermometer is absent from one beaker, the two liquid levels are visibly unequal, or the two flames are ignited at clearly different times rather than together.
level_3: Two beakers sit side by side on the table, the left filled with a clear liquid (water) and the right with a liquid (oil), one thermometer is fully immersed in each beaker, one alcohol lamp is centered directly beneath each beaker, both flames are lit at the same time, and both liquids are filled to matching levels.
level_4: Everything required for a 3-score is present, and in addition: both thermometer scales are readable, both liquid surfaces stay calm with no boiling or splashing, the water and oil are visually distinguishable by color (colorless versus pale yellow/amber), and no extra props (stirrers, stands, gloves) clutter the scene.
level_5: Everything required for a 4-score is present, and in addition: the camera holds one continuous frontal framing that keeps both beakers, both lamps, and both thermometers fully visible with no cropping or occlusion, both thermometer columns are seen to climb from their starting mark to a distinct new height as heating proceeds, and the water/oil color contrast stays consistent for the whole video.

Scientific and Causal Correctness rubric:
level_1: No visible temperature response is shown in either thermometer, or the columns fall or stay flat despite the flames burning, or the two columns end at the same height with no differentiation, or the left (water) column ends higher than the right (oil) column, or either liquid visibly boils or changes color/state.
level_2: One thermometer column rises, but the rise in the left (water) beaker is equal to or greater than the rise in the right (oil) beaker, or the right column rises only marginally more than the left in a way that is not clearly readable, or bubbling, vapor, or a color shift appears in either beaker before the video ends.
level_3: Both thermometer columns visibly rise from their starting mark, the right column (oil) ends higher than the left column (water), both liquids stay fully liquid with no boiling, and neither liquid changes color.
level_4: Everything required for a 3-score holds, and in addition: the gap between the right and left column heights is clearly readable rather than a near-tie, the liquid surfaces stay calm and transparent consistent with gentle (non-boiling) heating, and neither meniscus shows an odd shape suggesting incorrect fluid behavior.
level_5: Everything required for a 4-score holds, and in addition: the right-higher-than-left column gap holds steady through the final few frames rather than appearing only briefly, the oil keeps its pale yellow/amber color and the water stays clear and untinted throughout, and the full causal chain is visible on screen: both flames ignite together, both beaker bases warm, both columns climb, and the oil's column ends up higher than the water's because oil has the lower specific heat capacity.

Spatiotemporal Consistency rubric:
level_1: A beaker, lamp, or thermometer instantly jumps to a new position or vanishes from the frame between shots, a flame appears already burning at full size with no ignition moment, a thermometer column's height changes in a single instantaneous jump rather than climbing over time, or the scene's lighting or shadows shift abruptly and discontinuously between frames (for example a shadow vanishes or the brightness jumps) with no matching change in either flame.
level_2: A beaker or thermometer drifts or shifts position across frames without anyone moving it, a flame's size or shape pulses inconsistently frame to frame, or a thermometer column begins climbing before its flame is shown lit.
level_3: Both beakers stay in one fixed side-by-side layout for the whole video, both thermometers remain seated upright in their beakers without independent movement, and the event order is correct: both lamps ignite first, and only afterward do the thermometer columns begin to climb.
level_4: Everything required for a 3-score holds, and in addition: each thermometer column's climb reads as a smooth, gradual rise rather than a series of jumps, both flames flicker naturally without blinking off and on, and the tabletop and background stay fixed with no camera drift.
level_5: Everything required for a 4-score holds, and in addition: both liquid surfaces stay level and undisturbed aside from the rising column inside each thermometer's capillary, the beaker and thermometer outlines stay intact with no visible seams or floating parts, and the whole heating sequence plays out as one continuous, uninterrupted take with no jump cuts.