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In this activity (on pages 36-39), learners make a model of a watershed out of paper, then run water down the mountain to simulate how rainfall and pollution affect watersheds.

In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

In this activity, learners use aluminum trays and wooden blocks to form stream tables to investigate river formations in two different landscape scenarios.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.