Final Thoughts on Electromagnetic Force and Change

After looking at other peoples blogs i found these two very helpful Rob's and Katie's. I liked rob's comments and the two examples he gave: magnets and compasses. i also like how he even had a picture for very large magnets used in junkyards for lifting. I liked in Katie's post she also gave very good examples including the way electromagnetic door holders and traffic lights work.
I also thought of some better examples. I found one on this web site: "The forces which prevent you from falling through the floor or your chair, the forces that are exerted when you push an object, (friction, etc.) are all examples of the electromagnetic force in action." Another example (this one i actually thought of on my own) is when you rub two balloons on clothes and then right after try to stick them to each other. Since opposites attract the balloons will stick to clothes but then the two balloons end up having the same charge and repel each other.
Lastly, i wasn't sure whether or not we were supposed to comment on the different kinds of bonding b/c only a few people did, but they are ionic, covalent, and metallic. Through these ways of boning changes in atoms occur. For example through covalent bonding electrons are shared which changes the original structure of the atom. Also because of the way electrons and protons are arranged/bonded their forms can be changed. For example since chalk is an example of ionic bonding it shatters when thrown hard at the chalk board like we learned in class on Monday. This is because the electrons and protons can easily be shifted when hit (in very simple terms).