What are the two main causes of freezer burn?

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Prepare for the Pre-PAC Culinary Arts Exam with quizzes featuring multiple choice questions, flashcards, and helpful hints. Master the culinary arts concepts and increase your chances of success!

Multiple Choice

What are the two main causes of freezer burn?

Explanation:
Freezer burn happens when frozen food loses moisture and is exposed to air in the freezer. The two main factors are dehydration from water migrating to the surface and sublimating away, and oxidation driven by oxygen in the air at the surface. When packaging isn’t airtight, these processes occur more readily, drying out the surface and causing off flavors and color changes. So the best answer points to dehydration and oxidation due to air exposure. In practice, wrapping tightly or vacuum-sealing and keeping foods cold and stable helps prevent this by reducing contact with air and moisture loss.

Freezer burn happens when frozen food loses moisture and is exposed to air in the freezer. The two main factors are dehydration from water migrating to the surface and sublimating away, and oxidation driven by oxygen in the air at the surface. When packaging isn’t airtight, these processes occur more readily, drying out the surface and causing off flavors and color changes. So the best answer points to dehydration and oxidation due to air exposure. In practice, wrapping tightly or vacuum-sealing and keeping foods cold and stable helps prevent this by reducing contact with air and moisture loss.

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