How Small is Small

How Small is Small Activity

Which are smaller—red blood cells or bacteria? Which is thinner—a strand of hair or a grain of pollen? Size up some supersmall stuff, and put microscope photos of real, tiny objects in order from smallest to biggest.

Going Further
Related Activites from How To Smile

Try out the related activities listed below from 24/7 Science and other sources. Be sure to visit to find even more science and math activities on the web!

24/7 Science - Related Activities