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February 8: Review for the quiz and “How many viruses fit on the head of a pin?”

Today we calculated how many viruses can fit on the head of a pin.  With a virus at 200 nanometers in size, we figured out how many would fit into a 1mm pin head.  SPOILER ALERT: it was  lot of viruses.  The picture above is what that looks like under a microscope!  After that we reviewed for the quiz by going over the guided reading.

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