Growing Crystals From A Melt Worksheet Page 4

Analysis and Conclusions:

1. What similarities if any can you list between the samples after they

have recrystallized? (You may wish to compare # 1 to # 2, then # 1

to # 3, then #2 to #3)

2. What differences, if any, are there between the three samples after

they have recrystallized?

3. What factor is the only one varied in this experiment?

4. Write a simple statement of the relationship between cooling rate and

crystal size.

5. Use the video taken from your samples to make a PowerPoint

presentation explaining the relationship between cooling rate and

crystal formation. Draw a parallel to the crystals in three rocks you

find outside. Explain what this tells you about where the rocks

formed, deep under ground, near the surface, above the surface. This

portion of your lab will be counted as 50% of the lab group grade. If

you do not have access to the video camera, use the computer to

create your own graphics of the end results of the 3 parts of your

experiment.

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