How might they use spectroscopy to deter-

Question

mine the atmospheric composition of these
planets?
1. None of these
2. By analyzing the spectrum of the surface
of the planets.
3. All of these
4. By analyzing the molecules that compose
the planets.
5. By analyzing the spectrum of the atmosphere
sphere of the planets.
6. By analyzing the atoms that composed the planets

Answer 1

I would go with 5, but that is very misleading. How one does that is tricky, you do it by measuring absorbtion of light.

Answer 2

The correct answer is 3. All of these. You can get spectral information from almost any atom/molecule.