At what age can I move chicks into an outdoor coop?

I just got 5 EE chicks today that are almost 6 weeks old. They were raised in a garage and have been off heat lamp. I plan to keep them in my garage for a week or so with time outside to help them get used to the temps. I also plan to put them out in the big girl coop in a crate. The low temps will get down in the 20's in next week or so.since there are 5 birds, they should be okay in the crate in the coop right??? Also, if I keep them in the crate in the coop for a week, will they now the coop is their home, even if I remove the crate?

My husband brought home some baby chicks about 4 weeks ago some seem bigger than others i asked what kind of chicks they are he just said arab chicks ... we live in algeria and the weather now is around 16 degrees from everything i have read that they are maybe ready within the next 2 weeks to go out side ...Is this true ... he had brought home 7 and 2 died and from what i have read it could have been the wood shavings we had them on so we change the box their in and also took away the wood shavings and so far the remaining 5 are good ... just this last week he brought another 5 chick they look different to the others and bigger i'm not sure how old they are but looking at them they seem they too are ready to go out .... i dont worry about the hen as she too passed on over a week and a half ago i do have 2 roosters one is larger than the other and the smaller of them is lazy and doesnt even crow only this week he started to make some noises but clucking noises ..anyway my question is how do the rooster react to baby chick ..this is all new to me as i'm not from algeria ...i born and raised in Ireland but never dealt with chickens ...thank you for your help

I had two little broody bantams that hatched out one egg together, in a big plastic dog crate, sitting on the ground right outside the coop. The chick is now three weeks old and most of the big chickens seem to be fine, with the exception of two. One pecks at her and one attacks the two moms trying to get to the chick. I give them yard time for most of the day. When can I move from crate to hen house, w/o worrying about the one mean chicken?