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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

In this activity (on pages 12-15), learners make a crater model and test the effects of weather (rain) on its surface.

Learners investigate a pre-constructed mystery tube to determine its interior mechanism.

In this "game," learners explore and relate the evolution of stars to a Navajo creation story. The story is written on a series of cards, which are laid on a table as the story is told.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

This activity includes several games about animal sounds. Using their sense of hearing and communicating with various kinds of noisemakers, learners role-play predator and prey.

In this activity, learners survey living organisms near where they live or go to school, and create a local field guide.