Why does copper oxidise if it is considered a "noble metal"?

I'm an electrical engineer and not a chemist, so please excuse me if this is obvious.


When soft-soldering electronic parts, we’re normally taught to clean copper of oxides (like using flux and so on) before soldering. Also I’ve observed that when heating copper to $\ce{\approx 200 ^\circ C}$ copper changes colour and builds an oxide layer. So why is copper considered a [noble metal](https://en.wikipedia.org/wiki/Noble_metal)? Shouldn’t it be resistant to oxidation?


If the definition of noble metal is “less oxidation” instead of “no oxidation": Does that mean that gold and silver also build a small oxide layer in the $\pu{25 ^\circ C} - \pu{200 ^\circ C}$ temperature range?


