Ice Fishing with Salt and String

String picks up the ice cube. Ask students to predict what will happen. Lay wet string on ice, sprinkle salt, wait ~30 sec, lift. Key idea: Salt melts a thin layer; diluted water can refreeze around the string. Ask: How did the string get 'stuck' to ice? Safety and cleanup: Wipe meltwater. https://arboretum.org/wp-content/uploads/2021/02/ICE-FISHING.pdf