Question

Two students are discussing the interstellar medium and nebulae. Student one says, "Nebulae are regions of high dust density, but the interstellar medium is nothing more than gas." Student two says, "No. Nebulae are just regions where the density of the interstellar medium is much above average. They are made of both gas and dust, just as is the interstellar medium." You should ____.

Answer 1

Nebulae are regions of high density in the interstellar medium (ISM) that consist of both gas and dust particles.

Step-by-step explanation:

Student one is incorrect. Nebulae are not only regions of high dust density, but they are also made up of gas. Nebulae are concentrated clouds of interstellar material, which is collectively known as the interstellar medium (ISM).

Student two is correct. Nebulae are regions where the density of the interstellar medium is higher than average, and they consist of both gas and dust particles. Some of the best-known nebulae are the ones that emit visible light or reflect it, which gives them their glowing appearance.