What are you wondering?

Be sure to check out http://wonderopolis.org.  They have a wonder of the day that you can sign up for.  You can add your comments and hear what others are thinking and wondering.  Today's wonder of the day is "What is Chlorine?"

Video: Soeder, John. (July 19, 2013). What is Chlorine? Wonderopolis. retrieved on July 19, 2013. from http://www.weebly.com/weebly/main.php