Test students' ability to create a complete experimental protocol and predictive mathematical model to quantify how increasing CO2-driven ocean acidification affects coral calcification rates, including clear hypotheses, species selection, sampling strategy, control and treatment pCO2/pH gradients, environmental controls (temperature, salinity, light), replication and sample-size justification (power analysis), measurement methods (e.g., buoyant weight, alkalinity anomaly, micro-CT), time-series sampling schedule, listed variables and covariates, data preprocessing, and a detailed statistical and modeling plan (ANOVA/ANCOVA, regression or mixed-effects models, parameter estimation, model selection, uncertainty quantification, and validation), plus logistical and ethical considerations and a feasible timeline.