Is Rusting Iron a Physical Change?

temaire · 2009-09-15T17:57:49+00:00

This is a quick question. Is it correct to say that the change in color of iron to a reddish-brown color when the iron rusts is a physical change?

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...

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Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

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