Which term describes movement of material through closures such as seams or zippers?

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Multiple Choice

Which term describes movement of material through closures such as seams or zippers?

Explanation:
Movement through openings such as seams or zippers is described by penetration. This term specifically covers material getting through a closure or breach in the package, rather than moving through the barrier material itself. Permeation, by contrast, means the material travels through the thickness of the packaging material (the barrier), not through an opening, while diffusion refers to the spread of molecules within or across a material due to concentration differences, not through a physical gap. So the act of material passing through a seam or zipper is penetration.

Movement through openings such as seams or zippers is described by penetration. This term specifically covers material getting through a closure or breach in the package, rather than moving through the barrier material itself. Permeation, by contrast, means the material travels through the thickness of the packaging material (the barrier), not through an opening, while diffusion refers to the spread of molecules within or across a material due to concentration differences, not through a physical gap. So the act of material passing through a seam or zipper is penetration.

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