The Molecular Expressions Website has recently been nominated as a candidate for the 2001 Webby Awards in the sciences category. If you enjoy this site, please assist us by casting your vote in the People's Voice Awards balloting. Notice how each picture is actually an image of something that is 10 times bigger or smaller than the one preceding or following it. The number that appears on the lower right just below each image is the size of the object in the picture. On the lower left is the same number written in powers of ten, or exponential notation .
Exponential notation is a convenient way for scientists write very large or very small numbers.
Scientists examine things in particular ways using a combination of very sophisticated equipment, everyday instruments, and many unlikely tools. Some phenomena that scientists want to observe are so small that they need a magnifying glass, or even a microscope. Other things are so far way that they need a powerful telescope in order to see them. It is important to understand and be able to compare the size of things we are studying. Powers of 10 activity site.