Assess students' ability to recall commonly used paleoenvironmental proxies and identify the single primary environmental variable each most directly indicates. Coverage includes common marine and terrestrial proxies (e.g., stable isotopes, Mg/Ca, TEX86, pollen, diatoms, foraminifera, biomarkers, sediment grain size, charcoal) with emphasis on simple one-to-one matches such as temperature, salinity, precipitation/vegetation, productivity, or hydrodynamic energy.