I come apart when damaged, I change color when exposed to too much sun. what am I?

What kind of key can't fit in a lock but can turn a handle without any doubt

I am a place where purple lines lie and I sometimes hold the time. What am I?

When people look opon me they say all types of names. I come in all sorts of colors. I can end a war or start one. what am I?

I am both male and woman, I live where most living things couldn't, I always frown though my name suggest I shouldn't, What am I?