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In this Data Puzzle, students interpret a multiparameter graph of pollen data from a sediment core collected in the northeastern United States to assess changes that occurred in the tree community over a period of about 7,000 years. By comparing the pollen graph to present-day flora range maps, students infer temperature changes in the region during the time recorded in the core. Then, students interpret changes in sediment lithology recorded across the same time interval. Putting these pieces of information together, students infer that the sediments record the end of the last ice age in the region. This puzzle is suitable for courses in Earth science, living environment, and environmental science. This free selection also includes the Table of Contents, Introduction, and Index.