This document provides resources for research and questions about a density experiment. It includes: 1) Four websites with information on science, geography, physics, and layered density columns. 2) Questions about what surprised the student in the experiment, how changing the amount of vegetable oil would affect results, whether student hypotheses about the densest liquids were correct, and conclusions that can be drawn about earth's layer formation and the extremely dense inner core. 3) A request to record results from four experiment trials by describing and labeling color photos of each vial and explaining what was learned from each specific trial.