Structured for grades 5-7, this lab sheet walks your student through a controlled experiment comparing how red, blue, green, yellow, and white light each affect seedling height over a two-week period. The sheet opens with a guided hypothesis prompt, moves through an eight-step procedure, and closes with a data table organized by day and light color, plus four analysis questions that push beyond the numbers into reasoning about why plants respond differently to each wavelength.

The light wavelength on plant growth lab works well as a standalone unit or as a capstone to a botany or physics-of-light unit study. By the end, your homeschooler has practiced controlling variables, measuring from soil surface to plant tip, and drawing a conclusion supported by their own recorded data, skills that build directly toward more advanced lab work.