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Reply	Jon-Richfield says: Some of them have air bubbles in folds of their outer skin. Some may have enough ice to act as a float, either inside or on their surface. Sometimes this is possible because the pea got mildly damaged before being frozen.  (1 vote) average rating:3 Tags: plants, domesticscience, thermodynamics.
	posted on 2010-11-12 11:13:00 | Report abuse