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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

In this activity on page 8 of the PDF, learners investigate vitamin C. Learners conduct a chemistry experiment to determine if Tang drink mix or orange juice contains more vitamin C.

Water treatment on a large scale enables the supply of clean drinking water to communities.

In this activity, learners take on the role of various parts of the cell in order to model the process of protein synthesis.

In this activity, learners use household materials to investigate and explore their ability to smell an odor.

In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses.

A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.