What Makes Something Feel Warm? Modeling Energy Transfer: A Macroscopic and Particulate View Lesson Warm Up Why do mothers tell their kids to put on a sweater? What is it about the sweater that keeps them warm? This winter was soooo cold. My mother told me to “put on a sweater, because I’m cold.” THE BIG QUESTION Exploration #1: Observe the Properties of Materials Explore the properties of the tiles: • In groups of 2, answer questions 3-5 (Step 1) • In groups of 2, answer questions 6-8 (Step 2) • In groups of 4, answer question 9 (Prepare a white board that summarizes your ideas about temperature) Exploration #2: Observe Ice on Material Think about melting ice: • Work through questions 10-12 • Individually fill answer ALL of #13 • In your groups, complete Step 5. Modeling Energy Transfer A Macroscopic View and Engineering Practices Build a particle model that can be used to explain the interaction between the tile and the ice. Represent your model using a set of particulate drawings that describe the interactions between ice particles and tile particles. Exploration #2: Observe Ice on Material PREPARE A BUILD CONSENSUS WHITEBOARD SHARE IDEAS The American Association of Chemistry Teachers is brought to you by the American Chemical Society.