Over time, the star-gas-star cycle leads the gas in the Milky Way to
A. have a greater abundance of heavy elements.
B. have a lower abundance of heavy elements.
C. become denser and have a greater abundance of heavy elements.
D. become denser and hotter.
Answer:A
Over time, the star-gas-star cycle leads the gas in the Milky Way to
A. have a greater abundance of heavy elements. B. have a lower abundance of heavy elements. C. become denser and have a greater abundance of heavy elements. D. become denser and hotter.