Salt Lifts an Ice Cube on String

String freezes onto the ice. Ask students to predict what will happen. Lay string on ice, sprinkle salt, wait, then lift. Key idea: Salt melts a thin layer; surrounding cold water can refreeze around the string. Ask: Why did salt help the string stick? Safety and cleanup: Wipe meltwater. https://arboretum.org/wp-content/uploads/2021/02/ICE-FISHING.pdf