CHALLENGE MISSIONExplain availability

Watersheds, rivers, groundwater, and oceans

BRIDGE CHALLENGE - Water Systems Expedition: Why is usable freshwater limited? Transfer the map pattern to a new place and justify the best decision with geographic evidence.

MODELWatershed Globe

MAP

PROVEChoose with evidence

CLUE

Pause. Find what matters. Then make your move.

Bridge evidence note

Explain your choice with one detail, calculation, source clue, observation, or test result.

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