Question

JUST CHOOSE ABCD

QUESTION 6

1. When was most of the Helium in the Universe formed?
   

   	A.	Throughout the history of the Universe, by nuclear fusion in stars
   	B.	A few minutes after the Big Bang
   	C.	At the time of Recombination
   	D.	At the time of the Big Bang

10 points   

QUESTION 7

1. Based on current estimates of the value of Hubble?s constant, how old is the universe?

   	A.	more than 100 billion years old
   	B.	between 5 and 10 billion years old
   	C.	between 30 and 50 billion years old
   	D.	between 10 and 15 billion years old

10 points   

QUESTION 8

1. What two observable properties of a Cepheid variable are directly related to one another?

   	A.	its mass and its distance
   	B.	the period between its peaks of brightness and its luminosity
   	C.	the period between its peaks of brightness and its distance
   	D.	its luminosity and its mass

10 points   

QUESTION 9

1. The distribution of matter in the Universe is often called the cosmic web. What are its main components?
   

   	A.	Clusters, Groups, Isolated Galaxies.
   	B.	Clusters, Filaments, Voids.
   	C.	Galaxies, Stars, Gas.
   	D.	Dark Energy, Dark Matter, Regular Matter.

10 points   

QUESTION 10

1. What is Hubble's Law?

   	A.	The recession velocity of a galaxy is directly proportional to its distance from us.
   	B.	The recession velocity of a galaxy is inversely proportional to its distance from us.?
   	C.	The longer the time period between peaks in brightness, the greater the luminosity of the Cepheid variable star.?
   	D.	The faster a spiral galaxy?s rotation speed, the more luminous it is.

Answer 1