Discussion
Consider the following statements about aggregation.
1. It is efficient near zero degrees because surfaces become sticky.
2. It is also efficient near minus fifteen where dendrites interlock.
3. It is equally efficient at every temperature below freezing.
Answer: C
The first two are correct and identify the two maxima. The third is wrong, since aggregation is notably inefficient in the intermediate range where crystals are compact and not sticky. Aggregation efficiency is therefore strongly temperature dependent.
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