A student designed an experiment to test how light affects plant growth. Identify the components of this experiment.

Question

A student designed an experiment to test how light affects plant growth. Identify the components of this experiment.
<!-- AI image prompt | slot:plant_light_experiment_v3 | paste into Gemini/DALL-E/Midjourney: STRICT RULES — OBEY EVERY ONE OR THE IMAGE IS UNUSABLE:
(1) The image contains EXACTLY three text labels and NOTHING else: "Setup 1", "Setup 2", "Setup 3" — one centered below each plant panel. NO other text on the image. (2) The following words MUST NOT APPEAR anywhere on the image, in any form: independent, dependent, variable, control, controlled, manipulated, measured, factor, hypothesis, response, treatment, light, bright, dim, dark, height, growth, growing, plant height, day, week, cm, intensity, watt, lumens, lux, low, medium, high. (3) ZERO arrows, ZERO measurement scales, ZERO numerical values (no lengths, no light intensities, no day numbers, no percentages). (4) ZERO ruler graphics, ZERO measurement marks on the plants. (5) ZERO color legend, ZERO key, ZERO highlighted setup. (6) Background: pure flat white (#FFFFFF).

SUBJECT: Photorealistic textbook scientific-experiment illustration. Canvas 1600x900, pure white background, soft natural shading. THREE side-by-side identical workbench setups arranged left-to-right, evenly spaced. Each setup contains: ONE round terracotta pot of identical size and color, holding identical dark-brown soil filled to the same level, with the same visible quantity of water droplets on the soil surface (use the same visual amount across all three). The pots sit on identical wooden bench surfaces. ABOVE each pot, draw a single desk lamp pointing down at the plant.

DIFFERENCE BETWEEN PANELS (the only differences allowed): Setup 1 (left): the lamp is ON with a strong bright glow (golden halo radiating widely from the bulb, visible warm light cone reaching the plant). Inside the pot: ONE healthy upright plant — tall, with a thick stem and large lush green leaves. Setup 2 (middle): the lamp is ON with a moderate medium glow (smaller halo, narrower light cone). Plant is medium height, fewer/smaller leaves than Setup 1, slightly less vigorous appearance. Setup 3 (right): the lamp is OFF (no halo, no light cone, dark bulb). Plant is short, drooping, with sparse pale-yellow-green leaves. All other elements (pot, soil amount, water droplets, bench, lamp shape, lamp position) are IDENTICAL across the three setups — only the lamp's lit-state and the plant's appearance change.

LABELS: ONLY three — "Setup 1", "Setup 2", "Setup 3" centered below each panel. Bold sans-serif ~24pt, identical typography.

FINAL REMINDER: NO words about light, intensity, height, day count, growth, or any variable name. NO numerical measurements anywhere. NO arrows or rulers. Setups labeled only by neutral identifiers "Setup 1/2/3". Adding even one descriptive label like "Bright light" or "Plant height = 12 cm" breaks the question. -->

Accepted Answer

Independent: light; Dependent: plant height

Answer

Independent: plant height; Dependent: light

Answer

Independent: water; Dependent: soil

Answer

Independent: temperature; Dependent: light

A student designed an experiment to test how light affects plant growth. Identify the components of this experiment.

Explanation

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