This project is customized for jars that hold approximately 14 oz. If your jars are larger you will need to double the amount of water and sugar.
Yarn or cotton string (about 1.5 feet)
Tablespoon measuring spoon
Granulated white sugar (3 cups)
Screws, wooden beads, or other small nontoxic objects to use as weights (2)
Wooden skewers, Popsicle® sticks, or pencils (2)
Marker to write with
Ruler (with centimeter markings)
Glass jars, make sure they are identical in size and shape (2)
Measuring cup (for liquid ingredients)
Measuring cup (for dry ingredients)
Wooden mixing spoon
To start this science fair project, cut two pieces of yarn. Each piece should be approximately 1 inch longer than the height of the glass jars.
Set one of the pieces of string aside and do nothing to it. Soak the other piece of string in a cup of water for 5 minutes.
After soaking, use your hand to squeeze the excess water from the string. Roll the string in 1 tablespoon of sugar on a plate. The string will be coated with sugar. These small bits of sugar are the seeds on which other sugar crystals might grow.
Lay both your seeded (sugar-coated) string and your non-seeded string on a piece of wax paper overnight. Make sure they are not touching.
Prepare the strings.
Take your seeded string and tie one end to a screw, wooden bead, or other small object that can serve as a weight. It is ok if some of the sugar falls off while you're tying it to the weight. Repeat the process with the non-seeded string and a second weight. Be sure to use the same type of weight for each string.
Tie the other end of each piece of string to a skewer, Popsicle stick, or pencil. See Figure 2 below.
Using a marker, color the edges of the skewer that is holding the seeded string. That way you will know later which string had sugar on it. Make sure to write down in your lab notebook the marking of your...