Assess students' ability to design a simple, fair experiment to test how different amounts of sunlight affect plant growth by having them write a testable hypothesis; identify independent, dependent, and controlled variables; choose plant type and measurable growth metrics (e.g., height, leaf count); list materials and step-by-step procedures with replication; describe data collection and basic analysis (averages, simple bar graph); and explain how results support or refute the hypothesis while noting possible sources of error and improvements.