Sarah+Halihan

=__**Composition of Crystals**__=

**Background Information:**
Coming from the Greek word "krustallos", meaning ice and rock crystal, crystals are a solid material that are arranged in a repeating, 3-D pattern. The arrangement of a crystal's atoms are characterized by a unit cell, the smallest a crystal can be broken down and still retain its pattern. Large crystals have geometric shapes

**Materials :**
4 Glass Jars (Case of 6) - 27.95 (Walmart) Nylon Monofilament Fishing Line - 10.49 (Bass Pro Shop) Copper Sulfate (1 LB) - 8.22 (Amazon) Water - School Popsicle Sticks (75 pk) - 2.47 Hot Plate - School

**Procedure:**
1. Tie a string around a popscile stick and cut nylon string to 3/4 the lenght of the jar 2. Heat a small amount of water to boiling and stir in as much sugar as possible (about 3 cups of sugar to 1 cup of water) 3. Let sugar solution cool when no more sugar will dissolve in the water. 4. Pour solution in the jar 5. Hang the string in the j
 * For Sugar Crystal Test:**

Poltorak, Katya. “In a Groove: Helping Crystals Grow.” //Today's Science. // Infobase Learning, Jan. 2010. Web. 6 Dec. 2013.. [|http://www.waynesthisandthat.com/crystals.htm#exotic]
 * Bibliography****:**

Critiques James Bryan where is anything James Byan no data or info