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In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

In this activity on page 11 of the PDF, learners follow simple steps to recycle old newspaper into new paper.

In this chemistry activity (on page 2 of the PDF), learners corrode a penny in a cup with vinegar, salt water, and a source of iron (nails, paper clips, or twist ties).

In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).