Science and Uncertainty

My definition of science is : ways to prove what we know and what we are yet to know. Science is used by almost every person in the world to understand how everything works through proofs. However every time something is proved it is not necessarily true. Science 'updates' itself all the time, every time a new theory is made or a new scientific proof is found the old one has to be abandoned. For example people at first thought that the earth was flat and this theory was kept for some time. however after years it was found that the Earth is actually round. But is it really true? there are more proofs for the latter theory than the first one but it is always questionable. science is not fully true but it is all we have to prove whats around us or inside us. So why do we still believe what science teaches us? science is one of the only thing that we can rely on apart from religion to understand the world and although somethings are not understandable and some questions are not yet answered we can still rely on science for the rest. Science answers some questions that other fields cant.