How Big is a ... ?

JAVASCRIPT and CELLS alive!
Some pages on this site require that javascript be enabled in your browser preferences.

How Big is a ... ?
The head of a pin is about 2mm in diameter. Use this animation to compare the relative sizes of cells and organisms sitting on a pinhead. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller.

Download this and other animations for a single user or for an entire classroom.
HowBig is also available as a ready-to-use PowerPoint® Slide Presentation.
How to use:
Use the left and right arrows to change magnification.
Click on the magnifications (1, 10, 100...) for a "Power of Ten" zoom.
Choose an individual cell or organism (right) to bring it into view.
Use the scale to measure individual cells.
1 millimeter = 0.001 meter
1 micron = 0.000001 meter
1 nanometer = 0.000000001 meter
Some Keywords:
metric system, micron, angstrom, virus, bacteria, nanotechnology

Search the Web

Custom Search

Home | About Us | Awards | Privacy Policy | Permissions | Contact | ©2006 Quill Graphics

How Big is a ... ?

Some Keywords: