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In this activity, learners compare the ancient Egyptian system of measurement, which was based on body lengths, to the customary and metric systems used today.

In this activity related to microbes, learners create scale models of microorganisms and compare relative sizes of common bacteria, viruses, fungi and protozoa using metric measures: meters, centimete

In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.