Crystal Growth

Páginas: 4 (966 palabras) Publicado: 16 de febrero de 2013
Procedures

Pour 250 ml of heating pad temperature water into 3 beakers labeled 1,2 and 3, and place them on the heating pad, which should be on high, for 10-15 minutes. 
2. Do the same as #1,but pour closet temperature water into 3 beakers, and put them in the closet for 10-15 minutes. 
3. Do the same as #1 and #2, but pour refrigerator temperature water into the remaining 3 beakerswhich should also be labeled 1,2 and 3 and put them in the refrigerator for about 10-15 minutes. 
4. While the water is adjusting to the temperature it should be, tie 1 piece of string to each pencilaround the middle, and tie one paper clip to the end of each piece of string. Repeat this same step until all the string pieces are tied to each pencil and the paper clips are tied to the string. 5. When the water is ready, have 1 person go to each temperature of water. (1 person at the refrigerator, 1 person at the heating pad, so on.) Have all 3 people measure 2 tbsp. of rock salt into all 3beakers, all 3 people measuring simultaneously. 
6. Wait for about 3 days for the full growth. 
7. Record all the data from the experiment. 

* Results
The results of the experiment were thatthe hot temperature grew the fastest, and the room temperature grew half as fast and the cold temperature did not grow at all.
Trials | Hot water | Cold water | Room water |
Trial 1 | 100% | 0%| 50% |
Trial 2 | 100% | 0% | 50% |
Trial 3 | 100% | 0% | 60% |

Background
Crystal Formation 
Crystals form whenever a solid is formed from fluid. Crystals form from vapors, solutions ormolten materials, and are built from repeating units. Crystals grow from the outside, salt crystals build up from sodium and chloride ions. Crystal formation is called ëcrystallizationí. Crystallizationmeans "become crystals". Snowflakes form from water vapor. Rocks are usually made up of 1 or than usual, a new rock is formed called felsite. Felsite is crystalline, and its crystals cannot be...
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