Chapter 1 sections
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Most important:  1.1.,1.2,1.3
Least important: n/a
Important topics/concepts:
-ISM contains ordinary matter (gas & dust), B fields, cosmic rays
-the cycle of star formation shapes the ISM
-the make up and extent of the different phases of the ISM
-radiative transport; optical depth; brightness temperatures for low and high tau limiting cases

Chapters 2&3&4 sections
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Most important:  2.2,2.3,2.4,2.5,3.2,3.3,4.1
Least important: 2.6,3.9,3.10,4.2
Important topics/concepts:
-main physical processes for cooling
-HII region cooling functions maintain T equilibrium
-multi-phase models
-neutral ISM heated via photo-electric effect on PAHs
-ionized ISM heated via KE released from photo-ionization
-X-ray absorption cross-section *decreases* with increasing E
-[CII]158um is an important coolant of the neutral ISM
-dust T is based on blackbody physics; gas T is based on speed of ISM gas particles

Chapters 5&6 sections
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Most important:  5.2,5.3,6.1,
Least important: 6.4,6.5
Important topics/concepts:
-space-based 'scopes needed for gamma-ray, X-ray, UV, IR astronomy
-dust grain extinction goes as lambda^-4 for small a/lambda; flat for large a/lambda
-tau nearly identical to A
-dust-to-gas ratio ~constant for different MW sightlines
-large dust grains emit as (modified) blackbodies
-PAHs are stochastically heated, and emit 'features' at specific mid-IR wavelengths via vibrational/flexing modes
-infrared/radio ratio ~constant on global scales, but systematically varies within galaxies, thanks to different length scales that regulate the infrared vs radio emission

Chapter 7 subsections
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Most important:  7.2.1, 7.4 (intro), 7.4.1, 7.5.3
Least important: 7.2.2, 7.2.3, 7.5.5
Important topics/concepts:
-photo-ionization and recombination
-photo-ionization cross-section and dependence on nu
-recombination cross-section and dependence on T and e energy level n
-Stromgren spheres based on balance of photo-ionization and recombination
-ionization-based layering (stratification) of HII regions 
-'diffuse' vs 'direct' radiation from HII regions
-each recombination produces Lyman alpha and a Balmer line
-forbidden line emission and dependence on gas density

Chapter 8 sections
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Most important:  8.2,8.3,8.4,8.5,8.6
Least important: 8.7,8.8
Important topics/concepts:
-Multi-phase ISM more nuanced than original FGH two-phase model
-Multiple co-spatial SNe create superbubbles and possibly lead to 'galactic chimneys'
-HI clouds too diffuse and warm to collapse
-Molecular cloud free-fall time inversely proportional to sqrt(density)
-Factors that modulate GMC collapse: B fields, external pressures, rotation, metallicity
-Schmidt-Kennicutt Law relates star formation rate to gas density

Chapters 9&10 sections
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Most important:  9.1,9.3,9.4,9.6,9.8
Least important: 9.5,9.11,Ch.10
Important topics/concepts:

Chapters 11&12 sections
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Most important:  11.2,12.2,12.3,12.5
Least important: n/a
Important topics/concepts: