1. Depends on the child. I was self-motivated. My brother thought homework was the stupidest thing ever and didn't care if he failed. This is less of an age question and more a motivation/what a kid cares about question. It would be more appropriate to look at what would motivate a child to do their homework than at what age they should care.

2. Part of this is based on how you were raised. My SSs have to be reminded when they need to shower and wash their clothes. However, they have grown up with a BM who doesn't shower regularly and rarely had money to go to the laundromat. For them, skipping 2-3 days without a shower was "normal". For a "normal" kid, though, I think most kids will be early teens - when they start realizing they and others smell.

3. Could be never. I listened to 90s music in my childhood, R&B in my early teens, Christian and Christian rock in my mid-teens, and metal/rock/goth in my teens to early 20s. I was also a nerd who watched anime (still do) and RPed in IRC chat rooms. "Nerd" was the appropriate term. I'm not sure my music tastes and pop culture involvement mattered much.

4. Early teen years. My brother was an introvert and rarely wanted to hang out with people, parents included. He was fine with online communication with his buddies.

Honestly, the answer varies widely and can be dependent on so many factors.. there just isn't necessarily a norm.

But.. I will take a stab at it.

1. Age child can take Responsibility and getting homework done without being told a hundred times or needs a parent to walk them through how to do it?

I would think that by highschool that kids should generally be better able to manage their own time and homework obligations.  They may still need assistance for complex things.. but at this point, most parents are "stupid".. so kid really will need to get help from friends or teachers.

2. Age child starts to care about Hygiene? Will shower without being told. Will want clean clothes to wear.

Again, this tends to coincide with their interest in the opposite sex (or same sex as the case may be)... so certainly most kids will care about their hygiene in Jr High or High School.  I think girls start to care earlier than boys.. who can easily span into adulthood without really caring much for hygiene.

3. Will become interested in popular music/Pop culture?

Some kids never will.. some kids like older stuff.. some kids don't care for music at all.  but, most kids start developing their own taste in these things starting in jr high through HS years.

4. Will become more interested in hanging out with friends than hanging out with parents?

Usually HS and when they are 16+ and therefor able to escape their parents and start to develop friendships and circles independent on relying on their parents to drive them.

1) never! Lol   depends on whether they were raised with homework being a crucial part of school or whether they've been allowed to blow it off. Mine mostly do it on their own, but they procrastinate. Also, they have a healthy fear of failing a class and being left behind by their friends, so there's that.

2) when they realize their lack of hygiene is costing them something that's worth something to them. Some kids are Happy to be lonely slobs. They may grow up to be basement dwellers they may smarten up.

3) why does it matter what kind of music they're interested In? I love classical...and explicit rap. I also listen to country, rock, and French oldies... my kids love an eclectic mix too. What difference does it make? Getting pop culture references are only good if you're hanging with people who think they're cool because they can memorize lyrics and movie quotes... big talent. Lol I'd be more impressed if they could quote classical poetry...but that's just me.

4) maybe never... my oldest who just turned 17 hangs out with friends, but also likes to hang out with us and play boardgames. My middle one is all about her friends... and my youngest has an old soul, she prefers hanging out with adults and discuss adult things, even though she has many friends.

It's all relative I guess lol

I agree with ESMOD. Looking back on all three kids (bios and skid)
1. Age child can take Responsibility and getting homework done without being told a hundred times or needs a parent to walk them through how to do it?
Spawn never did she had to be told until she moved out at 17
BS about 12-13
BD 12-13

2. Age child starts to care about Hygiene? Will shower without being told. Will want clean clothes to wear.
Spawn age 10
BS about age 15-16
BD 12

3. Will become interested in popular music/Pop culture?
Spawn age 5
BS 18-19, he doesn't really care about that stuff
BD 7-8

4. Will become more interested in hanging out with friends than hanging out with parents?
Spawn 13
BS 17
BD 11

As everyone else mentioned, there is no general answer even for MOST kids. They are all different but here are my thoughts based on my kids:

1. Age child can take Responsibility and getting homework done without being told a hundred times or needs a parent to walk them through how to do it? - Probably high school. My oldest just started high school and she has been very on top of her homework this year, where as last year she had missing assignments or things turned in late pretty often. The other 2, who are in 3rd and 5th, are terrible with it. TERRIBLE I tell you!

2. Age child starts to care about Hygiene? Will shower without being told. Will want clean clothes to wear? - Ahh, this is a tough one. I think it varies more between girls and boys as well. My oldest has been super good about showering/hygiene since she was in probably 5th or 6th grade so roughly about 10, and my SD who is currently in 5th grade is pretty good about it too, but my SS who is in 3rd age 9, I swear he'd go days without showering if he could and he could care less about clean clothes.

3. Will become interested in popular music/Pop culture? I'm going to say 8-10 on this one. 

4. Will become more interested in hanging out with friends than hanging out with parents? I would say all my kids liked playing outside with friends from school or in the neighborhood since about 7 or 8. 

Agree with the chorus it depends on the child, but wanted to say I noticed around age 6-7 an interest in some of these things regarding more independence from mom and dad and the desire to hang with friends, notice the type of clothing they wear and taking more initiative on appearance. Initiative on homework might never happen

I am only going by my personal life. 

1. My kids were taught that the minute they get home from school home work is to be done. That said I would ask them if they had any homework each day, sometimes I would get the huffy yes and stomp off to the dining room table to do their work. Other times they would tell me that they completed it at school during free time. By the time they were around 9 years old I didn't have to ask if they had home work. My grandkids were taught the same way, the two girls would come home and rush through the homework at my daughters house and run out the door to play with their friends. The two grandsons figured out that they had enough free time at school during the lunch hour to get all their homework done then, so they could play after school. All the grandkids were independent on their homework by age 9 -10.

2. Hygiene was a big factor with my son and grandsons, they are 100% rough and tumble males. Rolling around in the dirt and mud is no big deal to any of them, but BO drives them crazy. By age 10 to 12 they all figured it out that a shower is needed so not to stink like a teenage asscrack or a locker room. The girls could live in the bathtub when they were younger, the routine was after dinner, 1 hour of play or tv, then baths.

3.The girls seem more interested in the music, I am guessing around 8 - 10 years old. I hated those stupid early 90's rock star posters all over my daughter's bedroom. The boys, I never really noticed any interest in the music, but they could sing along with a lot of songs on the radio.

4. Hanging out with friends was a big thing with my son and oldest grandson, this started at a very early for them, around 8 - 9 years old. YGS16 is a very late bloomer, too smart for his own good, regarding socializing with others in his age group. . He has issues communicating with kids his own age, to him they are boring and he doesn't have very much in common with them. YGS16 is going to a prep high school and taking college classes in the evening, this is his second year of college class, while in high school, he's a major nerd. My daughter and GD's are social butterflies from a early age, they would prefer to be around their friends starting around 7 - 8 years old.

We live in a small rural area that hasn't changed that much over the years, everyone knows everyone and all the kids have grown up together, so all the kids during the summer months are out and about without any parents around, most are very independent. 

it depends on the kid. 

Homework? High school generally. Some in late middle school. 

Hygiene? When they discover the joys of people liking their company as more than just friends. Or when they are hair and makeup crazy like middle DD is/was. 

Pop culture and music? DS (24) prefers 70s rock and 90s indie so some....never. My girls love The Beatles but also like The Jonas Bros. We are an eclectic family with a variety of tastes and none of us believe that pop culture is that important. 

Hanging with friends? Late middle school and high school generally. But all of the kids share interests with either DH or I or both of us so they hang with us even in their 20s. 

Mine was at age 10-11 and same with both skids.

Still waiting on SD17 to have acceptable standards of hygiene both personal and her surrounding environment. She is grim!

I have 3 teen daughters....so here are my answers based on my experience.

1. 7

2. 11-12

3. 10-11

4. 15-16

I would say that the answers to questions 1-4 are the same.  A: When their parents raise them to be confident, self aware and require them to do their homework, be accountable to  clean up their messes and their bodies, introduce them to music, and when kids are required to be outside away from the house after school for a few hours and most of each weekend day.

That is when kids will do these things. Some things can start at the toddler ages, some a bit later, and some for the remainter of childhood.  It depends on the parents and the standards of behavior and performance the insist on from their children.