Astronomy Exam 2 Part 2

10 Questions | By Mllanos87 | Last updated: Mar 20, 2022 | Total Attempts: 120

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There’s so much to learn about the universe because it continues to change and has very mysterious things. For example there is a mysterious form of matter that cannot be detected by normal means. The Astron 100 class gives you a lot of information about our universe. Test out what you know by taking the test below.

Questions and Answers

1.

Which of the following nuclear fuels does an one solar mass star use over the course of its entire evolution?
- A.
  
  A. hydrogen and helium
- B.
  
  B. hydrogen
- C.
  
  C. hydrogen, helium and carbon
- D.
  
  D. hydrogen, helium, carbon, and neon
- E.
  
  E. hydrogen, helium, carbon, neon, and oxygen
2.

The most important characteristic of a star for determining its lifetime is its
- A.
  
  A. temperature
- B.
  
  B. color
- C.
  
  C. distance from the main sequence
- D.
  
  D. radius
- E.
  
  E. mass
3.

Which element from the following list does not liberate energy when ”burned” via nuclear fusion in the center of a star?
- A.
  
  A. helium
- B.
  
  B. carbon.
- C.
  
  C. iron.
- D.
  
  D. silicon.
- E.
  
  E. neon.
4.

A neutron star is expected to spin rapidly because
- A.
  
  A. it has high orbital velocities.
- B.
  
  B. it has high densities.
- C.
  
  C. it has high temperatures.
- D.
  
  D. it conserved angular momentum when it collapsed.
- E.
  
  E. the energy from the supernova explosion that formed them made them spin faster.
5.

Which of the following is true of pulsars?
- A.
  
  A. They have very strong magnetic fields.
- B.
  
  B. They rotate very rapidly.
- C.
  
  C. They are neutron stars.
- D.
  
  D. They have a density approximately equal to the density of an atomic nucleus.
- E.
  
  E. All of the above are true.
6.

A white dwarf is supported against collapse by
- A.
  
  A. neutron drip.
- B.
  
  B. neutrino pressure.
- C.
  
  C. electron degeneracy pressure.
- D.
  
  D. neutron degeneracy pressure.
- E.
  
  E. a central black hole.
7.

In a supernova explosion
- A.
  
  A. the star may shine as brightly as billions of stars.
- B.
  
  B. elements heavier than iron are formed.
- C.
  
  C. material that later formed the Earth and us humans was distributed between the stars
- D.
  
  D. matter is ejected at tens of thousands of kilometers per second.
- E.
  
  E. All of the above.
8.

Which of the following stars is most dense?
- A.
  
  A. a supergiant star
- B.
  
  B. a white dwarf
- C.
  
  C. a main sequence star
- D.
  
  D. a giant star
- E.
  
  E. the sun
9.

If two stars have the same spectral type, then they must have approximately the same
- A.
  
  A. mass.
- B.
  
  B. parallactic distance.
- C.
  
  C. surface temperature.
- D.
  
  D. chemical composition.
- E.
  
  E. luminosity.
10.

Which of the following can escape from inside the event horizon of a black hole?
- A.
  
  A. particles of matter.
- B.
  
  B. particles of antimatter.
- C.
  
  C. visible light.
- D.
  
  D. X-rays.
- E.
  
  E. None of the above.