These animations and videos introduce the concept of orders of magnitude in measurement.

 

• Florida State University offers an animation on length scales: Secret Worlds: The Universe Within 

https://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html

 

Two classic short films on this topic have recently become legally available for free online:

• The Eames film Powers of Ten (1977) is now officially available from the Eames Office on YouTube

https://www.youtube.com/watch?v=0fKBhvDjuy0

• Eva Szasz’s Cosmic Zoom (1968) is available through the National Film Board of Canada

http://www.nfb.ca/film/cosmic_zoom/

 

Of course, in aerial photos like those used in some of these videos, the scale varies across the image due to perspective effects.

• This simulation from Wolfram illustrates this.

https://demonstrations.wolfram.com/AerialPhotoScale/