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Why do some objects sink and some objects float? Your students will find out as they make predictions and test different materials to see what sinks and what floats. Students will build and test their own boat to apply their understandings of why certain objects float, then see what happens when they add cargo to their creations.

grade: Preschool
NGSS: Engineering, Technology, and the Application of Science, ETS1: Engineering Design, K-2-ETS1-1, K-2-ETS1-2, K-2-ETS1-3