| In Part 1 of this experience, students worked with | | | | something could be hidden under it, but that's not what |
| "Rising Raisins". There they found that bubbles prefer | | | | is going to happen. Using the hammer, pound the nail |
| to form on a surface and just not come out of solution | | | | through the top of the cap to make a hole. You are |
| on their own. Here, we take that knowledge and | | | | done with the hammer and nail. |
| attempt to get lots of bubbles to form in one small | | | | Run the string through the hole so that the cap is |
| area to create a "Pop Bottle Fountain". | | | | halfway up the string. Attach one Mentho to the end |
| For this, you will need a two liter bottle of seltzer | | | | of the string that is going into the cap. Use some tape |
| water. Soda will work fine but it tends to make a | | | | to do this. This attachment will be flimsy at best. Draw |
| sticky mess. Seltzer water will just evaporate leaving | | | | the attached Mentho up into the bottle cap by pulling |
| no sticky residue. As far as clean-up is concerned, | | | | on the string that leaves the top of the cap. Screw the |
| seltzer water is the winner. | | | | cap (with the Mentho inside) tightly onto the bottle. Do |
| You will also need a hammer, nail, a piece of string | | | | not let the Mentho touch the seltzer water. You're |
| about two feet long, some tape, and a candy Menthos. | | | | ready for the fountain. Make sure it is pointing at no |
| Menthos are mint flavored chewy candies found in the | | | | one. |
| grocery check-out. There are six or eight in a package. | | | | Count down, "Three, two, one!", and pull the string. The |
| Have the students make observations about a | | | | Mentho will be freed from the string and tape and drop |
| Mentho. They will note that its white, smooth, and not | | | | into the seltzer water. There, the Mentho will provide |
| round. Ask them to observe the shell more closely. It | | | | lots of surface for bubbles to form very quickly. The |
| really isn't as smooth as it appears on first glance. | | | | pressure will build inside the bottle and the water will |
| What do you think will happen if we place this in | | | | spray from the bottle as a gorgeous, though short |
| seltzer water? | | | | lived, fountain. Quite exciting, indeed. Did the students |
| Carefully remove the cap from the seltzer bottle. | | | | guess correctly? |
| Some gas will escape. Don't worry. Place the cap on | | | | Next time, more science activities to try. Until then, |
| the sidewalk so that the top is facing up. In this way | | | | have fun! |