Exam 3 Flashcards
The stream of charged particles that escape the Sun’s gravitational pull is best described by which of the following terms?
Solar wind
What are the principal elements you would find in the sun?
Hydrogen and Helium
Auroras are beautiful displays. What are they caused by?
Streams of charged particles from the sun
Which of the following gives the best information to determine a star’s intrinsic brightness?
Spectrum
In the lifecycle of a star, it becomes stable when the outward and inward forces shown here balance each other. What is the source of the inward force (pulling in)?
Gravity
For a massive main sequence star, what is the missing stage between “star” and “black hole”?
Supernova
In the lifecycle of a star, it becomes stable when the outward and inward forces shown here balance each other. What is the source of the outward force (pushing out)?
Nuclear fussion
Cosmic rays are primarily composed of high energy…
Protons
What does the red shift in light spectra from distance galaxies imply?
Galaxies are moving farther apart from one another
The stars of Population I
Are of varying ages and located in the spiral arms of our galaxy
Current ideas suggest that what is responsible for the observed properties of quasars is
A massive black hole.
The Milky Way is an example of what type of galaxy?
Spiral Galaxy
The open universe view says that the universe
Has been and will continue to expand
Which of the following is not true of the Big Bang Theory
It accurately predicts the amount of matter we observe in the universe
What are we usuing in our current attempts to communicate with life on other planets?
Radio waves
