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    American Society for Microbiology
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    Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell. For comparison, multiple eggs can...

    1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    In this activity on page 3 of the PDF, learners visualize the relative size and structural differences between microbes that have the potential to cause disease. Learners work in groups and use...

    $10 - $20 per group Ages 11 - 18 1 to 2 hours
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    University of Utah
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    In this activity, learners place cards featuring biological structures in order by their relative size from largest to smallest. The cards feature structures ranging from the carbon atom (340 pm)...

    1 cent - $1 per group Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    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. Learners will be surprised to...

    free Ages 8 - 18 10 to 30 minutes