Astronomy Exam
Fourth Quarter, Academic
Dr Jamie Love
1997 - 2011
Hello and welcome to your last Academic exam. This will test your knowledge of the materials covered in lessons 37 to 48 (the Fourth Quarter) of this course.
Self Evaluation Test - Pretest info
When you choose an answer you will get a "pop-up" response indicating whether you got it right or wrong and provides feedback. This immediate feedback is a learning tool so read each reply carefully. I suggest that the first time you take the test, you simply stick with your original answers, complete the test and submit it for a grade. This will give you an idea of what you have learned so far and is more like a "regular" test. (Whatever that is. ) Your answers will be graded and each one will be scored Correct or Wrong. Once you have the score and the list of incorrect answers you can use your "Back Button" to return to your exam and correct your errors. This second time with the exam you can carefully read each response, learn from it and choose the right answer – then submit your perfect score for a final grade.
Self Evaluation Test
Choose the best answer by selecting one of the buttons. When you get to the bottom of the page, submit your answers.
1 : Messier (M) objects are ...
fuzzy.
galaxies.
nebulas.
star clusters.
2 : Which of these types of galaxies has the most dust and gas?
Spiral galaxies
Irregular galaxies
Barred Spiral galaxies
Elliptical galaxies
3 : For the most part, the disk or "arms" of a spiral galaxy is composed of ...
Population I stars.
Population II stars.
a nearly equal ratio of Population I and II stars.
Population III stars.
4 : Stars with heavy elements making up less than 0.8% of their chromospheres are ...
Population I.
Population I and II.
Population II.
None of the above.
5 : Collisions between galaxies are often distinguished by ...
massive destruction of stars as the stars collide together.
Population II stars being turned into Population I stars.
red stars forming where the galaxies collide.
blue stars forming where the galaxies collide.
6 : The First Point is ...
the point on the Celestial Sphere where the Sun passes from north to south across the Celestial Equator.
the point on the Celestial Sphere where the Sun passes from south to north across the Celestial Equator.
at your zenith.
the point on the Celestial Sphere where your meridian intersects the ecliptic.
7 : The zero hour right ascension (0 hr RA) line runs from ...
ORION's belt to SAGITTARIUS.
near Polaris to the southern hemisphere's South Polar point.
near Polaris, through the First Point and to the southern hemisphere's South Polar point.
near Polaris, through the First Point, to the southern hemisphere’s South Polar point and back around to Polaris.
8 : The types of light, arranged from the least energetic (longest wavelength) to the most energetic (shortest wavelength) are ...
visible, infrared, ultraviolet, radio waves, gamma rays, X-rays.
gamma rays, X-rays, ultraviolet, visible, infrared, radio waves.
radio waves, infrared, visible, ultraviolet, gamma rays, X-rays.
radio waves, infrared, visible, ultraviolet, X-rays, gamma rays.
9 : An active galactic nucleus (AGN) produces huge amounts of radio waves by ...
synchrotron radiation.
bremsstrahlung radiation.
nuclear fusion.
chemical reactions.
10 : The Earth's precession circle is ...
47o in diameter.
has a period (repeats itself) of 25,800 years.
responsible for the ever drifting position of the "North Star".
All of the above.
11: _____________ is the most accurate way to measure the distance to a nearby star and requires no preconceived theories.
A standard candle
Parallax
A supernova
Laser interferometry
12 : _____________ are variable stars that pulse at a particular rate the depends upon their absolute magnitude (or at least, that is what we assume) from which we can calculate their distance.
Cepheid variables
W Virginis variables
Both of the above.
None of the above.
13 : The Doppler effect is used to measure a star's ...
transverse motion.
radial motion.
both transverse and radial motion.
proper motion.
14: A planet might be detected forbiting a star by changes in the star's ...
transverse motion.
radial motion.
transverse and / or radial motion.
None of the above are a way to detect a planet.
15 : Hubble's constant explains ...
the speed of light.
that, as an object recedes quickly from us, its spectrum will be red shifted.
the evolution of galaxy shapes.
that, the velocity a galaxy is receding can be used to calculate its distance.
16 : Red shift (symbol "Z") is defined as the ...
change in wavelength of an absorption spectral line divided by the unshifted wavelength of that line.
unshifted wavelength of an absorption spectral line line divided by the change in wavelength of that absorption spectral line.
change in wavelength of an absorption spectral line multiplied by the unshifted absorption spectral line's wavelength.
velocity a galaxy is receding divided by its distance.
17 : As an object approaches the speed of light, relativistic effects cause ...
its time to run in reverse.
its time to slow down.
the object's mass to increase.
its time to slow down and the object's mass to increase.
18 : In astronomy, critical density is ...
the mass density of the universe needed to produce enough gravitational force to counter the expansion.
the density that will cause an object to become a blackhole.
the density that will cause an object to undergo nuclear fusion.
the current density of the universe.
19 : The history of the universe it divided into these three very unequal parts.
Star, red giant and white dwarf.
Quantum cosmology, particle cosmology and standard cosmology.
Big bang, big crunch and oscillating universe.
Population I, Population II and AGNs.
20 : The “background radiation” discovered by Wilson and Penzias is evidence for ...
winning a Nobel Prize.
the Steady-State Theory.
the Big Bang Theory.
the Oscillating Universe Theory.
You can now submit your exam to for grading. If your answers were less than perfect you will receive a score and a list of Incorrect (and Correct) replies. Then you can use your "Back Button" to return to this page and correct your earlier errors. Once you have corrected all your earlier errors (by rechoosing a correct answer when you were told you are wrong), you will get a perfect score.
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