2006-10-05 05:01:25 · 6 answers · asked by Apple 1 in Science & Mathematics ➔ Other - Science
All critters need air (whatever chemical they breathe, they need it). No air, the critters (microbes, molds, what-have-you) can't grow and eat the food, spoiling it.
2006-10-05 09:32:11 · answer #1 · answered by tehabwa 7 · 0⤊ 0⤋
well, canned foods have to be vacuum packed due to bacterial growth in the air and the food. by vacuum packing foods it not only stops bacteria from entering but it also stops growth of bacteria already present in the foods.
2006-10-05 12:13:45 · answer #2 · answered by precious_mommy_of_1 2 · 1⤊ 0⤋
Vacuum helps with preservation and sterility of the goods. If theirs air and light in the jar then who knows what will try and grow in there, lol.
2006-10-05 12:03:52 · answer #3 · answered by csar3742 2 · 1⤊ 0⤋
In order to preserve the taste and also minimise the proliferation of such bacteria as the one which causes botulism.
2006-10-05 13:54:54 · answer #4 · answered by marizani 4 · 0⤊ 0⤋
So that it's air tight and no bacteria can grow in it. It also can't spoil that way.
2006-10-05 12:03:06 · answer #5 · answered by Night Wind 4 · 0⤊ 0⤋
To help it last longer while canned.
2006-10-05 12:03:16 · answer #6 · answered by Jer 3 · 0⤊ 0⤋