When you buy a bag of chips or whatever it will stay fresh for a long time but once you open the bag it will only last for a few days. How is this possible?

Question

Like there is air in the bag as well so how come it can last for longer period of time when sealed?

In: Earth Science

Answer 1

In general foods, have to stay isolated, from other bacteria that could live in the bag. When the cell doesn’t get oxygen or other process components for processes like respiration, it can not survive. It’s like making a ceiling to the rain forest, to kill the trees, because they wouldn’t be able to make photosynthesis. All these processes are essential for all mikro to makro species, getting energy to stay alive. If we open the chips bag, bacteria could potentially live and spread inside. The air is not dangerous for the chips. It’s the bacteria, which could respirate the air