Which of these properties of a star best determines its life cycle?
brightness
mass
density
temperature

Explain the popular saying "we are made of stardust. how are we made of stardust? use scientific vocab.

"[because of the emancipation proclamation] the condition of things [became] … unsettled, revolutionary, with nothing clearly defined, neither slave nor slaveholder having any rights which they felt bound mutually to respect … slave property in the state of missouri was almost a dead weight to the owner; he could not sell because there were no buyers."—h.c. bruce, a former slave in missouri what does this excerpt suggest about the effects of the emancipation proclamation? a. it also undermined slavery in the border states despite not being in effect there.b. it caused complete disintegration of southern society in the states that seceded.c. it led to slave owners not even trying to stop their slaves from leaving the farms.d. it prevented riots or chaos as both owners and slaves simply ignored each other.

I’ll be a junior in high school next year and i’m aiming for top colleges like northwestern university, princeton, stanford, etc. i’m worried my schedule for next year isn’t challenging enough in the eyes of top colleges. my courses next year are: ap english lit, ap psychology, english 3 hn, pre-calculus hn, us history (only offered at an average level or ap which is a 2 semester course), physics (same reasoning as us history), students in action (a class centered around volunteer work), and creative writing (i want to major in creative writing or literature). is this a “challenging” junior year? i’m on the varsity swim team and i have a part-time job so i don’t want to overwork myself. i also have limited space in my schedule and can’t take both ap us history and ap physics (both are 2 semesters). i can always take ap biology (2 semester class) and get rid of both physics and us history altogether (i’d rather take ap bio than ap physics and i can easily take physics senior year) but i’d have to take us history online because it’s a required junior class. it all comes back around to i need us history no matter what.