Question

The spectra of interstellar gas clouds show that they have the same basic composition as

A) interstellar dust.
B) Earthʹs atmosphere.
C) stars.
D) asteroids.
E) the Martian polar caps.

Answer 1

The spectra of interstellar gas clouds have the same basic composition as interstellar dust.

Step-by-step explanation:

The spectra of interstellar gas clouds show that they have the same basic composition as A) interstellar dust. Interstellar dust consists of solid particles composed of many atoms and molecules, including rocklike materials and ices. The gas clouds in interstellar space contain individual atoms and molecules, similar to the composition of interstellar dust grains. When light passes through interstellar dust clouds, it can be scattered or absorbed, resulting in specific features in the spectrum.