Why does a plastic bottle that is sealed at a high altitude change its shape when it is taken to a low altitude? the number of gas molecules that strike the outside of the bottle increases as altitude decreases. the number of gas molecules that strike the outside of the bottle decreases as altitude decreases. the bonds between the molecules of the plastic bottle become weaker as the altitude decreases. the bonds between the molecules of the plastic bottle become stronger as the altitude decreases.

The number of gas molecules that strike the outside of the bottle increases as altitude decreases.

Answer A is correct, I just took the test

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.