Question

choose A B C D

QUESTION 5

1. When astronomers look at globular clusters they don't see any stars hotter/more luminous than our Sun. What does this mean for the age of the globular cluster?

   		The globular cluster doesn't have enough gravity to capture any stars more massive than our sun yet.
   		The globular cluster is younger than the typical lifetime of a star like our Sun.
   		The globular cluster is older than the typical lifetime of a star like our Sun.
   		The globular cluster has assembled too recently for stars like our Sun to form.

10 points   

QUESTION 6

1. There are hundreds of elements in the Universe, which of the following best describes how they were created?

   		The Big Bang made no elements, supernova explosions made them all.
   		The Big Bang produced most of the different types of elements, fusion in stars made a little.
   		The elements have always existed, and hence couldn't be 'created' in a Big Bang or a star.
   		The Big Bang produced mostly Hydrogen and Helium, fusion in stars and during supernova explosions made the rest.

10 points   

QUESTION 7

1. The Sun is a low mass star, what is the most likely sequence of events in its future?

   		It will use up it's fuel in another 5 billion years, expanding to become a Red Giant, eventually it's core will be a White Dwarf.
   		It will explode in another 100 million years as a Supernova, leaving behind a dense Neuron Star.
   		It will use up it's fuel in another 5 billion years, expanding to become a Red Giant, eventually leaving behind a Black Hole.
   		It will explode in another 10 million years as a Supernova, leaving behind a Black Hole.

Answer 1

Question 5 option (c) it is older than sun because sun age is 4.6 billion and cluster has 18 billion

Question 6 option (d) after billion of years reactions takes place to form rest elements from dust and hydrogen

Question 7 option (a) so it's become a red giant after that becomes white dwarf