qu.1.topic=Cosmology 2@

qu.1.1.mode=Blanks@
qu.1.1.name=Cosmology 2@
qu.1.1.editing=useHTML@
qu.1.1.question=<P>The universe began approximately <1> billion years ago in an explosion named the Big Bang.  All of the matter and energy of the 
universe was concentrated in one very small location with <2> temperature and density.  Ever since then the universe has been expanding, cooling, 
and forming more complicated structures. </p>
<BR>
</p>The early universe consisted of a hot, dense gas and radiation.  Most of the energy of the universe was in the form of <3>.  Conversions from 
matter to radiation and back occurred regularly through the processes of pair producation and annihilation.  The universe greatly increased in size 
in a process called <4> when the 4 fundamental forces separated.  Fusion allowed the formation of larger nuclei, but nothing larger than <5> formed 
since there are no stable nuclie with either 5 or <6> particles.  Eventually the universe cooled sufficiently for electrons to become bound to atoms.  
This event is known as the <7>. Radiation could now travel freely in the universe.  We call the radiation released at this time the Microwave Background Radiation. </p>
<BR>
<P>There are three possibilities for the future of the universe: open, <8>, and closed. If the universe $res it would be termed <9>. 
In a $end universe, the energy of the universe is <10> and the density is <11> the critical density. Recent observations suggest that 
the universe is open and that the expansion actually accelerating. </p>@
qu.1.1.algorithm=
$num=rint(2);
$res=switch($num,"expands forever","contracts back into a big crunch");
$goodResult=switch($num,"open","closed");
$badResult=switch($num,"closed","open");

$num2=rint(2);
$end=switch($num2,"open","closed");
$goodEnergy=switch($num2,"positive","negative");
$badEnergy=switch($num2,"negative","positive");
$goodDensity=switch($num2,"less than","greater than");
$badDensity=switch($num2,"greater than","less than");
@
qu.1.1.blank.1=13.7,16.8,19.2,9.1@
qu.1.1.blank.2=high,low@
qu.1.1.blank.3=radiation,matter@
qu.1.1.blank.4=inflation,anihilation,coexpansion,weight gain@
qu.1.1.blank.5=berrylium,lithium,helium,hydrogen@
qu.1.1.blank.6=8,7,6,9@
qu.1.1.blank.7=recombination,deionization,atomic binding,electron capture@
qu.1.1.blank.8=flat,enclosed,stopped,captured@
qu.1.1.blank.9=$goodResult,$badResult,flat@
qu.1.1.blank.10=$goodEnergy,$badEnergy,zero@
qu.1.1.blank.11=$goodDensity,$badDensity,equal to@

qu.1.1.grader.1=menu@
qu.1.1.grader.2=menu@
qu.1.1.grader.3=menu@
qu.1.1.grader.4=menu@
qu.1.1.grader.5=menu@
qu.1.1.grader.6=menu@
qu.1.1.grader.7=menu@
qu.1.1.grader.8=menu@
qu.1.1.grader.9=menu@
qu.1.1.grader.10=menu@
qu.1.1.grader.11=menu@