Astronomy 101 Section 002

Test 4 Review

Monday, December 9, 2002

2:00 – 3:45 p.m.

Regener Lecture Hall

 

Chapters 14 – 18

 

50 Questions, 100 points total, 2 points per question

Multiple Choice

 

Concepts and Terms for Review

 

Chapter 14 The Milky Way Galaxy


What is a galaxy?,

Parts of the Milky Way:

Galactic disk

Galactic bulge

Galactic halo

Galactic center,

Variable stars,

Pulsating variable stars:

RR Lyrae & Cepheids,

Period-Luminosity Relationship,

Properties of stars in halo,

Properties of stars in disk,

Spiral arms & spiral density waves,

Self-propagating star formation,

Galactic rotation curve,

Dark halo,

Dark matter

 


 

Chapter 15 Normal Galaxies


Hubble classification scheme,

Spiral galaxies & their properties,

Barred-spiral galaxies & their properties,

Elliptical galaxies & their properties,

Irregular galaxies & their properties,

Standard candles,

Tully-Fisher relation,

What are galaxy clusters & Superclusters?

What are voids?

Collisions and mergers and acquisitions,

Hubble’s Law,

Cosmological Redshift

 


 

Chapter 16 Active Galaxies


What are active galaxies?

Seyfert galaxies & their properties,

Radio galaxies: core-halo, radio lobes, and their properties,

Model of radio galaxies,

Theory of energy source of active galaxies,

Synchrotron radiation,

Quasars or QSOs & their properties,

Theory of galaxy evolution,

Gravitational Lensing


 


 

 

 

 

Chapter 17 Cosmology


Properties of the Universe,

What is cosmology?

Cosmological Principle,

Olber’s Paradox,

Theory of the Big Bang,

Critical density & its role in cosmology,

Effects of the cosmological constant,

Closed Universe,

Open Universe,

Critical Universe,

Cosmic background radiation,

Matter-dominated vs radiation-dominated times,

Primordial nucleosynthesis,

Grand Unified Theories:

Inflation,

Horizon problem,

Flatness problem

 


 

Chapter 18 Life in the Universe


Cosmic evolution,

Evolution of life:

Amino acids

Nucleotide bases

Complex molecules,

The Drake equation

Strategies for finding technological life:

The water hole