Since everything is “lighter” in space due to the lack of gravity, you don’t need as much strength to do things so your muscles begin to deteriorate and weaken because you aren’t maintaining your strength.
1) One drug 7th graders and older should know about is Tylenol with the chemical name Acetaminophen. Tylenol is important because it is used for commonly not only amongst kids but also adults to treat muscle pains and to reduce fever. 7th graders should learn about how much Tylenol is necessary to help treat pains, in order to safely use it when they must.
I will answer more later, but I have to go
you'd have to go beyond your limits. And you can't keep telling yourself, "there's no way I could do that" something I always say is that "as long as you don't give up, you've never truly lost, only when you give up are you truly defeated". And, it depends on what you do and what your interests are. You could be a streamer or an activist. But you need to be aware of what people like and don't like, while also being yourself.