Thursday, October 7, 2010

J.J. Thomson's Cathode Ray Experiment

Before 1897, the atom was considered the smallest unit of matter and was indivisible. In 1897, however, the English scientist J.J. Thomson changed the ideas of matter drastically. With his cathode ray tube experiment, Thomson discovered the electron, particle more than 1,000 times smaller than the lightest known particle at the time, the hydrogen atom. Thomson proved that the atom was not indivisible and began study of matter at the sub-atomic level.

To learn more about Thomson's experiment, click on this link- J.J. Thomson's Cathode Ray Experiment


  1. Ms. Van Buskirk, I wasn't quite sure how to post a video on PREZI, so I was wondering if I needed to make a new post with the video in it or if I should wait and post the video on the PREZI. Video describing Thomson's experiment can be found here(5)

  2. In general, you did a good job!! I liked the tidbit of information that you included on your blog as an introduction to your Prezi. In addition, reading through your Prezi was quick, simple, and easy to understand. My two suggestions would be to possibly include a few more pictures when making the Prezi and also to use some sort of interesting design instead of just a few circles. Also, just to let you know, to get a YouTube video in Prezi, all you have to do is past the URL link of the YouTube video in a text box and click OK. The video will show up automatically. Overall, great job!!