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How Big is a ...?
Category: For Educators, Strategies for Outreach, Education, and Communication, Ocean and Climate Literacy, For Graduate Students
Resource Type: Web-Based
Date Posted: 04/14/2008

This interactive flash animation allows students to compare the sizes of the smallest organisms we know of on our planet. Starting with the head of a pin at 2 millimeters in diameter, students can use this animation to compare the relative sizes of cells and organisms small enough to sit on a pinhead. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller. [Source: CELLS alive! J. Sullivan, Website: http://www.cellsalive.com] Grade level: 4-College.

LINK (http://www.cellsalive.com) >>
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