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In this activity, learners hook up a hair to a lever system and create a hair hygrometer to measure changes in humidity.

In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen.

In this activity, learners perform a simulated blood test procedure.

In this activity, learners construct a cereal chain as a model of how proteins are made in the cell.

In this activity on page 5 of the PDF, learners compare water with artificial urine to see how urinalysis works. Learners use urinalysis test strips to test for glucose and protein in the fake urine.

In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.

In this activity, learners cut wells in JELL-O© and load the wells with different detergent solutions.