1. Review Quiz No. 24 :60 Question 1: What type if galaxy is this? 1.Sb 2.Sd 3.SBa 4.E6 5.Irregular

2. Question 2: Is this galaxy poorer or richer in interstellar gas and dust than the one from the previous question? 1.Poorer. 2.About equal. 3.Richer. 4.Impossible to tell. :45

3. Question 3: Distance measurements using the Cepheid method and the Supernova Ia method are called “standard candle” methods because we know the … of Cepheids and Ia type Supernovae. :45 1.distances 2.masses 3.absolute magnitudes 4.radii 5.temperatures

4. Question 4: Hubble’s Law states that the … is proportional to the … of distant galaxies. :45 1.rotation period / luminosity 2.luminosity / distance 3.distance / rotation period 4.recession speed / distance 5.luminosity / size