1. Atom
   An atom is a microscopic structure found in all ordinary matter around..
   http: //academickids.com/encyclopedia/index.php/Ato...
   
   
2. BrainPOP - Heath, Science, Technology Animation and Educational Site for Kids.
   Animated movies, comic strips, activity pages about matter..
   http: //brainpop.com/science/matter/
   
   
3. MathMol Hypermedia Textbook for Elementary School-Grade 5
   Elements. Compounds, and Mixtures..
   http: //nyu.edu/pages/mathmol/textbook/5gradeco...
   
   
4. All About Atoms - What are atoms?
   What are atoms? A very basic overview of atomic structure.
   http: //education.jlab.org/atomtour/