Why Are Chemical Bonds More Stable at Cooler Temperatures?

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Homework Statement



I was wondering why bonds are more stable at cooler temperatures than at higher temperatures.

This question came from a research project about annealing (heating then colling) plastics and why polyethylene maintains its shape when it's cooled.
 
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What happens to atoms/molecules when temperature goes up?
 

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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