How does galaxy composition typically relate to the age of the stars in the galaxy?(1 point)

Question

Responses

Star formation consumes dust and gas, so galaxies where stars are oldest typically consist of higher proportions of dust and gas than other galaxies.
Star formation consumes dust and gas, so galaxies where stars are oldest typically consist of higher proportions of dust and gas than other galaxies.

Star aging emits gas and dust, so galaxies with the youngest stars typically have the lowest proportions of dust and gas.
Star aging emits gas and dust, so galaxies with the youngest stars typically have the lowest proportions of dust and gas.

Star formation and the presence of young stars is common across galaxies, regardless of the proportions of dust and gas present.
Star formation and the presence of young stars is common across galaxies, regardless of the proportions of dust and gas present.

Stars form from dust and gas, so galaxies with younger stars typically consist of higher proportions of dust and gas than other galaxies.

Answer 1

The correct response is:

Stars form from dust and gas, so galaxies with younger stars typically consist of higher proportions of dust and gas than other galaxies.

This answer reflects the relationship between star formation, the presence of gas and dust, and the age of the stars within a galaxy. Young stars are usually found in regions dense with gas and dust, as these materials are essential for star formation. As stars age and evolve, they can return processed materials to the interstellar medium, but galaxies with a higher proportion of older stars tend to have lower amounts of natal gas and dust available for new star formation.