Mission Brief A schoolyard puddle disappeared after a sunny morning. Two days later, rain filled it again. The caretaker thinks the original water was destroyed and entirely new water appeared. Your investigation team must explain how water can move between the ground and atmosphere. Complete four stations, collect four process names, and assemble a scientifically accurate explanation to solve The Returning Puddle Mystery. Learning Target Explain how evaporation, condensation, precipitation, and collection move water through a repeating cycle, using patterns and evidence. Materials & Setup Materials: printer paper, pencils, scissors; no water experiment required. Print one copy of each station per team and place copies at four numbered locations. Teams contain four students: reader, recorder, evidence checker, and reporter; rotate roles. Give each team a paper recording sheet with four numbered boxes and space for its final explanation. Cut Station 1’s four event descriptions into separate strips before class. Timing: mission briefing, 4 minutes; four stations, 7 minutes each; final solution, 8 minutes; debrief, 5 minutes. Assign different starting stations; rotate teams through all four. Keep the Answer Key separate until teams submit their explanations. Station 1 Pattern recognition: Arrange these strips into a repeating loop: “Water gathers in a puddle.” “Liquid water becomes water vapor.” “Water vapor cools into tiny liquid droplets.” “Water falls from clouds.” Label the events: collection, evaporation, condensation, precipitation. Draw arrows connecting them, including the last event back to the first. Record the process that turns puddle water into a gas as Clue 1. Station 2 Evidence: Read these observations: A puddle becomes smaller during a warm, dry afternoon. No drain is nearby. Later, rising moist air cools, and tiny liquid droplets form. Explain what happened to the puddle’s water. Then identify the process responsible for the droplets. Remember: water vapor is an invisible gas; clouds contain tiny droplets and/or ice crystals. Record the droplet-forming process as Clue 2. Station 3 Application: A cloud contains water droplets. Some grow large enough to fall to the schoolyard as rain. Draw the water’s journey from cloud to ground. Explain why the falling rain is precipitation rather than evaporation or condensation. Name one other form of precipitation. Record the process that delivers water from clouds to the ground as Clue 3. Station 4 Reflection: A student says, “The cycle ends when rain reaches the ground.” Discuss whether this is correct. Sketch rain gathering in a puddle, then show what could happen during another sunny afternoon. Write one sentence explaining why the water cycle repeats. Record the process in which water gathers in the puddle as Clue 4. Solution Path Arrange Clues 1–4 into this explanation: puddle water undergoes evaporation; cooling water vapor undergoes condensation; water returns through precipitation; water gathers through collection. Connect collection back to evaporation. Submit the labeled loop and explain why the caretaker’s claim is incorrect. This model explains a possible pathway; it does not prove that the same individual water molecules returned to this puddle. Answer Key Clue 1: evaporation—liquid water becomes water vapor. Clue 2: condensation—water vapor becomes liquid droplets. Clue 3: precipitation; acceptable additional examples include snow, sleet, or hail. Clue 4: collection; collected water can evaporate again. Correct loop: collection → evaporation → condensation → precipitation → collection. Final solution: water changes state and location; evaporation does not destroy it. The water cycle has additional pathways beyond this simplified loop. Differentiation Provide process names beside simple sketches for students needing vocabulary support. Offer the frame: “Water moves from ___ to ___ through ___.” Allow oral explanations with a partner recording the team’s reasoning. Extend by adding runoff, infiltration, or plant transpiration to the loop. Debrief Minute 1: Teams share their final loops. Minutes 2–3: Ask: “Which evidence shows a change of state? Which shows movement?” Minute 4: Discuss why clouds are visible but water vapor is invisible. Minute 5: Exit ticket: explain how puddle water could eventually become rain.