Thursday, August 30, 2007

Science Experiments and Slime Recipe

The boys being silly...



And SCIENCE......................
Jen doing an experiment to show differences in density...





Josh beginning a chemistry project, growing crystals....


and Jack with his own chemistry experiment.....making SLIME! Instructions to follow...


And early yesterday morning, the kiddos were up eating breakfast, and had already started their puzzles for spelling! Now that is motivation!


Homemade Slime Recipe
Borax
White Glue
Water
Food Coloring (optional)
Ziploc bag

1. Borax is available in the laundry section of your local grocery store. Take a cup of water and add to it 1 Tbs. of borax (approx 4% solution). Stir until completely dissolved.
2. Make a 50% water 50% white glue solution. Take 1/4 cup of each and mix thoroughly.
3. In a ziploc bag, add equal parts of the borax solution to equal parts of the glue solution. 1/2 cup of each will make a cup of slime.
4. Add a couple drops of food coloring.
5. Seal bag and knead the mixture.
6. Dig in and have fun. Remember to wash your hands after playing.
7. Keep your slime in the sealed bag in the refrigerator when not playing with it to keep it longer. Unfortunately it may eventually dry out or grow mold. Just throw it out and start again!

Explanation:
The borax is acting as the crosslinking agent or "connector" for the glue (polyvinyl acetate) molecules. Once the glue molecules join together to form even larger molecules called polymers, you get a thickened gel very similar to slime. If you've tried this recipe (formula) before using blue starch (instead of the borax) with mixed results, you won't be disappointed with this one. Works every time! If you have access to a chemical supply house, try a 4% solution of polyvinyl alcohol instead of the glue for a less rubbery polymer and one that is transparent showing off the color better.