Universe Tenth Edition Chapter 23 Galaxies Roger Freedman Robert Geller William Kaufmann III Clicker Questions

Which of the following is the correct order of applicability of distance measuring techniques, from shortest distance to longest distance? A.Parallax, Population I Cepheid variables, Tully-Fisher, Type Ia supernovae B.Parallax, Tully-Fisher, Population I Cepheid variables, Type Ia supernovae C.Parallax, Tully-Fisher, Type Ia supernovae, Population I Cepheid variables D.Population I Cepheid variables, Tully-Fisher, parallax, Type Ia supernovae E.Parallax, Type Ia supernovae, Population I Cepheid variables, Tully-Fisher Q23.1

Which of the following is the correct order of applicability of distance measuring techniques, from shortest distance to longest distance? A.Parallax, Population I Cepheid variables, Tully-Fisher, Type Ia supernovae B.Parallax, Tully-Fisher, Population I Cepheid variables, Type Ia supernovae C.Parallax, Tully-Fisher, Type Ia supernovae, Population I Cepheid variables D.Population I Cepheid variables, Tully-Fisher, parallax, Type Ia supernovae E.Parallax, Type Ia supernovae, Population I Cepheid variables, Tully-Fisher A23.1

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. Q23.2

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. A23.2

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. Q23.3

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. A23.3

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. Q23.4

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. A23.4

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. Q23.5

The galaxy shown in this photo is a (an) A.spiral galaxy. B.barred spiral galaxy. C.irregular galaxy. D.elliptical galaxy. E.cluster galaxy. A23.5

The Andromeda galaxy, a member (like the Milky Way) of the Local Group of galaxies, is A.a spiral galaxy smaller than the Milky Way. B.a spiral galaxy larger than the Milky Way. C.an elliptical galaxy smaller than the Milky Way. D.an elliptical galaxy larger than the Milky Way. E.a barred spiral galaxy larger than the Milky Way. Q23.6

The Andromeda galaxy, a member (like the Milky Way) of the Local Group of galaxies, is A.a spiral galaxy smaller than the Milky Way. B.a spiral galaxy larger than the Milky Way. C.an elliptical galaxy smaller than the Milky Way. D.an elliptical galaxy larger than the Milky Way. E.a barred spiral galaxy larger than the Milky Way. A23.6

How did Edwin Hubble show that M31 in Andromeda is a distant galaxy and not part of the Milky Way? A.By measuring the distance to M31 using Cepheid variables. B.By measuring the distance to M31 using RR Lyrae variables. C.By precisely measuring the parallax of M31. D.By observing a nova in M31. E.By observing a supernova in M31. Q23.7

How did Edwin Hubble show that M31 in Andromeda is a distant galaxy and not part of the Milky Way? A.By measuring the distance to M31 using Cepheid variables. B.By measuring the distance to M31 using RR Lyrae variables. C.By precisely measuring the parallax of M31. D.By observing a nova in M31. E.By observing a supernova in M31. A23.7

In which of the following types of galaxies would you be least likely to find a newly-formed star? A.Elliptical B.Spiral C.Irregular D.Misleading question — newly-formed stars can be found in ellipticals, spirals, and irregulars Q23.8

In which of the following types of galaxies would you be least likely to find a newly-formed star? A.Elliptical B.Spiral C.Irregular D.Misleading question — newly-formed stars can be found in ellipticals, spirals, and irregulars A23.8

Population I stars contain metals as well as hydrogen and helium. In which of the following types of galaxies would you expect to find no Population I stars? A.Elliptical B.Spiral C.Irregular D.More than one of the above E.Misleading question — Population I stars can be found in ellipticals, spirals, and irregulars Q23.9

Population I stars contain metals as well as hydrogen and helium. In which of the following types of galaxies would you expect to find no Population I stars? A.Elliptical B.Spiral C.Irregular D.More than one of the above E.Misleading question — Population I stars can be found in ellipticals, spirals, and irregulars A23.9

Which of the following best describes the Hubble law in its simplest form? A.The recessional velocity of a galaxy is proportional to its distance from us. B.The recessional velocity of a galaxy is inversely proportional to its distance from us. C.The brightness of a galaxy is proportional to its distance from us. D.The brightness of a galaxy is inversely proportional to its distance from us. E.The brightness of a galaxy is inversely proportional to its color. Q23.10

Which of the following best describes the Hubble law in its simplest form? A.The recessional velocity of a galaxy is proportional to its distance from us. B.The recessional velocity of a galaxy is inversely proportional to its distance from us. C.The brightness of a galaxy is proportional to its distance from us. D.The brightness of a galaxy is inversely proportional to its distance from us. E.The brightness of a galaxy is inversely proportional to its color. A23.10

A galaxy is 2 × 10 8 parsecs from our Galaxy. According to Hubble ’ s law, what would you expect the distant galaxy ’ s velocity of recession to be? (Use H 0 = 73 km/s/Mpc.) A.2.74 km/s B.146 km/s C.200 km/s D.1.46 × 10 4 km/s E.3.65 × 10 5 km/s Q23.11

A galaxy is 2 × 10 8 parsecs from our Galaxy. According to Hubble ’ s law, what would you expect the distant galaxy ’ s velocity of recession to be? (Use H 0 = 73 km/s/Mpc.) A.2.74 km/s B.146 km/s C.200 km/s D.1.46 × 10 4 km/s E.3.65 × 10 5 km/s A23.11

What does Hubble ’ s law tell us about how galaxies are moving? A.All galaxies are moving away from us at the same velocity. B.Galaxies close to us are receding from us slowly, and galaxies farther from us are receding more rapidly. C.Galaxies close to us are receding from us rapidly, and galaxies farther from us are receding more slowly. D.Galaxies have random distribution of velocities— there is no pattern. Q23.12

What does Hubble ’ s law tell us about how galaxies are moving? A.All galaxies are moving away from us at the same velocity. B.Galaxies close to us are receding from us slowly, and galaxies farther from us are receding more rapidly. C.Galaxies close to us are receding from us rapidly, and galaxies farther from us are receding more slowly. D.Galaxies have random distribution of velocities— there is no pattern. A23.12

Which of the following statements about the dark matter problem is incorrect? A.The luminous mass of a cluster of galaxies is not large enough to account for the observed motions of the galaxies. B.Hot intergalactic gases in rich clusters account for a small part of the unobserved mass. These gases are detected by their X- ray emission. C.Gravitational lensing of remote galaxies by a foreground cluster enables astronomers to glean information about the distribution of dark matter in the foreground cluster. D.All of these statements are correct. Q23.13

Which of the following statements about the dark matter problem is incorrect? A.The luminous mass of a cluster of galaxies is not large enough to account for the observed motions of the galaxies. B.Hot intergalactic gases in rich clusters account for a small part of the unobserved mass. These gases are detected by their X- ray emission. C.Gravitational lensing of remote galaxies by a foreground cluster enables astronomers to glean information about the distribution of dark matter in the foreground cluster. D.All of these statements are correct. A23.13