| Show how you can do electrolysis which is separating | | | | and push them almost half way through the |
| the hydrogen from the oxygen in water. | | | | cardboard. |
| When you put some chemicals together in a reactive | | | | Put warm water into the glass far enough so that |
| way they create electricity. You have seen this | | | | the pencil bottoms will be able to be submerged by |
| before because it is used every time you use a | | | | at least an inch or two. Stir about a teaspoon of salt |
| battery. This type of chemical electricity can be used | | | | into the warm water until dissolved. |
| to make things work like flashlights, toy cars, DVD | | | | Using the electric wire attach one piece to the top |
| players and more. | | | | graphite/lead of one of the pencils and to the |
| Water has oxygen and hydrogen within it. A molecule | | | | positive part of the battery. Now cut another piece |
| of water contains an atom of oxygen and 2 atoms | | | | of electric wire and attached to the lead of the other |
| of hydrogen. If electricity runs through water | | | | pencil and the negative part of the battery. |
| between electrodes of a battery you can split the | | | | Set the cardboard on top of the glass with the |
| parts of water into two. They are oxygen and | | | | pencils hanging in the glass at one end and the other |
| hydrogen. When you have done this you did | | | | end of the pencils extend above the cardboard. |
| electrolysis. | | | | Now sit back and watch the electricity from the |
| Create a science project which separates the part of | | | | battery run through the pencils. You should notice |
| water. | | | | small bubbles at the tip of each pencil submerged in |
| You will need these items: | | | | the water. The bubbles you see are hydrogen and |
| - A nine volt battery | | | | chlorine gases |
| - 2 pencils | | | | Why would you see chlorine? A secondary reaction |
| - Salt | | | | occurred. Oxygen does not release in this experiment. |
| - A glass tall cup | | | | The reason for this is that oxygen combines with the |
| - A piece of thin cardboard | | | | salt in the water. Because salt has a chemical makeup |
| - Electric wire | | | | of sodium chloride, the chlorine gas from the chlorine |
| Take your two pencils and sharpen both ends of | | | | in the salt is given off. The bubbles you see are |
| each. You will have to remove the eraser and metal | | | | hydrogen and chlorine. |
| end before sharpening. | | | | Enjoy the science project with your friends. |
| Punch two holes into the cardboard with the pencils | | | | |