<!--
/** 
 *  1/19/05 (A. Gonzalez) Chapter No., Book No. and Title Added
 *  6/20/05 Modified: (J. Lucca) Removed frames from quizzes. 
 *  7/7/05 Modified: (J. Lucca) 
 *     Can turn off HISTOGRAM and randomize_questions on any ch##.htm page  
 *     by setting them here to false. Both default to true in quiz.js.
 *  12/1/05 Modified: (J. Lucca) 
 *     Can turn off histogram SECTIONS and/or TYPES on any ch##.htm page
 *     by setting them here to false. Both default to true in quiz.js.
 */
 
//////////////////////////////////////////////////////////////////////////////
// HISTOGRAM AND RANDOMIZE OPTIONAL SETTINGS
//    Can turn off per quiz or leave defaults (handled in quiz.js) as true.
//////////////////////////////////////////////////////////////////////////////
//HISTOGRAM = false;
//SECTIONS = true; 
TYPES = false;
//randomize_questions = true;


/**
 * Required settings for all quizzes:
 *    chapter_no, book_no, book_title
 *
 * Required when HISTOGRAM = true:
 *    At least a section_title[] with its matching q#section for each question
 *    or a type_title[] with its matching q#type for each question.
 *    Without at least one of these you won't get any histograms.
 */
 
// ////////////////////////////////////////////////////////////////////////////
// BEGIN PASTE - Paste any existing quiz javascript questions
//               between this comment and one just like it near bottom of page
// //////////////////////////////////////////////////////////////////////////// 

  
// General settings
var book_title = "21st Century Astronomy, 2e";
var book_no = 92443
var chapter_no = "20";
quiz_name = "21st Century Astronomy 2nd Edition, Chapter 20";
var confirm="/college/astronomy/studyspace/_content/_index/confirm.htm"
number_answers = new Array(4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4)
var number_questions = number_answers.length;

// Sections
section_title = new Array()   //Leave at least this line! Can delete ones under.
section_title[1] = "Section 20.1";
section_title[2] = "Section 20.2";
section_title[3] = "Section 20.3";
section_title[4] = "Section 20.4";
section_title[5] = "Section 20.5";
section_title[6] = "Section 20.6";

// Types
type_title = new Array();     //Leave at least this line! Can delete ones under. 
type_title[1] = "Factual";
type_title[2] = "Vocabulary";
type_title[3] = "Conceptual";

q1 = "The universe is";
q1a = "staying the same size.";
q1b = "expanding.";
q1c = "shrinking.";
q1d = "revolving.";
q1answer = "b";
q1section = "2";
q1type = "1";
q1review = "";

q2 = "The rules of the universe";
q2a = "should be the same everywhere.";
q2b = "depend on the intensity of starlight in the area.";
q2c = "depend on the local acceleration of gravity.";
q2d = "depend on the density of matter.";
q2answer = "a";
q2section = "1";
q2type = "1";
q2review = "";

q3 = "For the universe to be homogeneous, it must";
q3a = "have the same properties  in all locations.";
q3b = "look the same as viewed from all directions.";
q3c = "have an event horizon.";
q3d = "be spherical.";
q3answer = "a";
q3section = "1";
q3type = "2";
q3review = "";

q4 = "For the universe to be isotropic, it must";
q4a = "have the same properties in all locations.";
q4b = "look the same as viewed from all directions.";
q4c = "have an event horizon.";
q4d = "be spherical.";
q4answer = "b";
q4section = "1";
q4type = "2";
q4review = "";

q5 = "The spectra of distant galaxies have what feature?";
q5a = "They show different compositions than our own galaxy.";
q5b = "They show higher temperatures than our own galaxy.";
q5c = "They show Doppler shifts toward longer wavelengths.";
q5d = "None of the above is true.";
q5answer = "c";
q5section = "2";
q5type = "1";
q5review = "";

q6 = "As observed from our perspective, most other galaxies seem to be moving";
q6a = "toward us.";
q6b = "away from us.";
q6c = "in an orbit around us.";
q6d = "not at all.";
q6answer = "b";
q6section = "2";
q6type = "1";
q6review = "";

q7 = "According to Hubble's Law, a galaxy's";
q7a = "velocity toward us gets greater as its distance from us increases.";
q7b = "velocity away from us gets greater as its distance from us increases.";
q7c = "rotation rate gets smaller as its distance from us increases.";
q7d = "rotation rate gets larger as its distance from us increases.";
q7answer = "b";
q7section = "2";
q7type = "3";
q7review = "";

q8 = "Hubble's Law requires what measurement be made to determine a distance to a galaxy?";
q8a = "Temperature";
q8b = "Mass";
q8c = "Velocity";
q8d = "Luminosity";
q8answer = "c";
q8section = "2";
q8type = "3";
q8review = "";

q9 = "The implication of Hubble's Law is that";
q9a = "we are at the center of the universe.";
q9b = "galaxies move at high velocity through space.";
q9c = "space itself is expanding.";
q9d = "galaxies are getting bigger.";
q9answer = "c";
q9section = "2";
q9type = "3";
q9review = "";

q10 = "For Hubble's Law to be correct, our universe must be";
q10a = "homogeneous.";
q10b = "heterogeneous.";
q10c = "very young.";
q10d = "very old.";
q10answer = "a";
q10section = "2";
q10type = "3";
q10review = "";

q11 = "Peculiar velocities of galaxies are most prominent for those that are";
q11a = "far from us.";
q11b = "near us.";
q11c = "heavily redshifted.";
q11d = "heavily blueshifted.";
q11answer = "b";
q11section = "2";
q11type = "2";
q11review = "";

q12 = "To directly measure a distance to a distant galaxy, you would be most likely to use";
q12a = "parallax.";
q12b = "the standard candle of a Type I supernova.";
q12c = "a Cepheid variable star's luminosity.";
q12d = "radio emissions from AGNs.";
q12answer = "b";
q12section = "2";
q12type = "1";
q12review = "";

q13 = "Looking at objects farthest in distance allows";
q13a = "us to look back in time.";
q13b = "us to look ahead in time.";
q13c = "us to see the objects as they were when light left them.";
q13d = "both (a) and (c).";
q13answer = "a";
q13section = "2";
q13type = "1";
q13review = "";

q14 = "Earlier in the universe, galaxies were";
q14a = "closer together than they currently are.";
q14b = "farther apart than they currently are.";
q14c = "the same distance apart as they currently are, but the speed of light has increased.";
q14d = "the same distance apart as they currently are, but the speed of light has decreased.";
q14answer = "a";
q14section = "3";
q14type = "3";
q14review = "";

q15 = "The universe is somewhere around";
q15a = "13 million years old.";
q15b = "100 million years old.";
q15c = "14 billion years old.";
q15d = "100 billion years old.";
q15answer = "c";
q15section = "3";
q15type = "1";
q15review = "";

q16 = "The Hubble constant is related to Hubble time, which measures";
q16a = "the age of the universe.";
q16b = "half the age of the universe.";
q16c = "the time remaining for the universe.";
q16d = "none of the above.";
q16answer = "a";
q16section = "3";
q16type = "2";
q16review = "";

q17 = "The Big Bang best describes";
q17a = "an explosion of material within our universe.";
q17b = "the beginning of the universe as we know it.";
q17c = "the ending of the universe as we know it.";
q17d = "an explosion of material at the center of our galaxy.";
q17answer = "b";
q17section = "3";
q17type = "2";
q17review = "";

q18 = "Redshifts of distant galaxies are due to";
q18a = "their high velocities through space away from us.";
q18b = "their high velocities through space toward us.";
q18c = "the increasing expanse of space between galaxies.";
q18d = "the shrinking of space between galaxies.";
q18answer = "c";
q18section = "3";
q18type = "1";
q18review = "";

q19 = "Cosmic background radiation is";
q19a = "now known to be nonexistent.";
q19b = "radiation left over from the early universe.";
q19c = "infrared radiation produced in the current universe but hidden by dense clouds.";
q19d = "scattered starlight that has been weakened to become microwave wavelengths.";
q19answer = "b";
q19section = "4";
q19type = "2";
q19review = "";

q20 = "The cosmic background radiation traces back to";
q20a = "the moment of the Big Bang.";
q20b = "after the Big Bang but before recombination of the universe.";
q20c = "after the Big Bang and after recombination of the universe.";
q20d = "the moment when galaxies began to form in the universe.";
q20answer = "c";
q20section = "4";
q20type = "1";
q20review = "";

q21 = "Nuclear reactions taking place in the moments after the Big Bang produced";
q21a = "hydrogen.";
q21b = "helium.";
q21c = "oxygen.";
q21d = "iron.";
q21answer = "b";
q21section = "4";
q21type = "1";
q21review = "";

q22 = "Recent data from type I supernovae indicate that the expansion of the universe";
q22a = "is being slowed by gravity.";
q22b = "is being slowed by the lack of critical mass density in the universe.";
q22c = "is unaffected by gravity.";
q22d = "has been speeding up.";
q22answer = "d";
q22section = "5";
q22type = "1";
q22review = "";

q23 = "The cosmological contant is";
q23a = "calculated from the inverse of the Hubble time.";
q23b = "dependent on the original volume of the universe.";
q23c = "a repulsive force to counteract gravity.";
q23d = "the ratio of the actual density of the universe divided by its critical density.";
q23answer = "c";
q23section = "5";
q23type = "2";
q23review = "";

q24 = "The horizon problem in cosmology is that";
q24a = "the universe has no curvature.";
q24b = "quantum mechanics has a much bigger effect in today's universe than it did in the past.";
q24c = "the cosmic background radiation is too smooth.";
q24d = "the universe expanded very slowly.";
q24answer = "c";
q24section = "6";
q24type = "2";
q24review = "";

q25 = "Inflation was a period";
q25a = "when the flatness of the universe increased.";
q25b = "when cosmic background radiation blueshifted.";
q25c = "during which the universe expanded at a rate exceeding the speed of light.";
q25d = "when the opacity of the universe increased.";
q25answer = "c";
q25section = "6";
q25type = "2";
q25review = "";


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// END PASTE - End of paste for existing questions
// ////////////////////////////////////////////////////////////////////////////
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