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In this activity, learners test the rate of ripening fruit and vegetables and use a chemical to inhibit the ripening process.

In this activity learners observe mold growth on different types of bread by measuring and recording the growth rate.

In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.