What happens after many generations of the star-gas-star cycle?
A) The heavy element abundance decreases, the amount of gas increases.
B) The heavy element abundance increases, the amount of gas increases.
C) The amount of gas and heavy elements stay the same: it's a cycle.
D) The heavy element abundance increases, the amount of gas stays the same.
E) The heavy element abundance stays the same, the amount of gas decreases.
F) The heavy element abundance increases, the amount of gas decreases.

Question

What happens after many generations of the star-gas-star cycle?
A) The heavy element abundance decreases, the amount of gas increases.
B) The heavy element abundance increases, the amount of gas increases.
C) The amount of gas and heavy elements stay the same: it's a cycle.
D) The heavy element abundance increases, the amount of gas stays the same.
E) The heavy element abundance stays the same, the amount of gas decreases. 
F) The heavy element abundance increases, the amount of gas decreases.

Quizplus · Accepted Answer

Over many generations of the star-gas-star cycle, stars produce heavy elements through nuclear fusion and supernovae, increasing heavy element abundance. However, as stars form, they consume gas, leading to a decrease in the overall amount of gas.

What Happens After Many Generations of the Star-Gas-Star Cycle