Final Study Guide

Last Updated By David Gauch on 08/01/2013
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Which is closest to the temperature of the Sun's core?

Answer:
a)  100,000 K
b)  100 million K
c)  10 million K
d)  10,000 K
e)  1 million K
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    Answered in Final Study Guide
    The core of the Sun is
    a)composed of iron.
    b)at the same temperature and density as its surface.
    c)at the same temperature but much denser than its surface
    d)constantly rising to the surface through convection.
    e)much hotter and much denser than its surface.
    e)much hotter and much denser than its surface.
  • David Gauch
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    Which of the following is not a method astronomers use to determine the physical conditions inside the Sun?
    a)Measuring Doppler shifts to observe solar vibrations.
    b)Building mathematical models that use the laws of physics.
    c)Observing X-ray images of the solar interior using satellites
    d)Detecting solar neutrinos generated in the sun's core
    e)both C and D
    c)both C and D
  • David Gauch
    Answered in Final Study Guide
    The light radiated from the Sun's surface reaches earth in about 8 minutes. However, the energy of this light was released by fusion in the Sun's core about
    a)11 years ago.
    b)several hundred thousand years ago.
    c)several hundred years ago.
    d)several thousand years ago.
    e)8 minutes ago.
    b)8 minutes ago.
  • David Gauch
    Answered in Final Study Guide
    Hydrogen fusion in the Sun requires a temperature (in Kelvin) of
    a)millions of degrees.
    b)billions of degrees.
    c)thousands of degrees.
    d)any temperature, as long as gravity is strong enough.
    e)trillions of degrees.
    a)trillions of degrees.
  • David Gauch
    Answered in Final Study Guide
    Studies of solar vibrations have revealed that
    a)they are caused by processes similar to those that create earthquakes.
    b)neutrinos from the solar core reach the solar surface easily.
    c)the Sun generates energy by nuclear fusion.
    d)the Sun vibrates only on the surface.
    e)our mathematical models of the solar interior are fairly accurate.
    e)our mathematical models of the solar interior are fairly accurate.
  • David Gauch
    Answered in Final Study Guide
    At the end of its life, the remaining core of this star will be left behind as
    At the end of its life, the remaining core of this star will be left behind as
    a)a white dwarf made primarily of carbon and oxygen.
    b)a white dwarf made primarily of silicon and iron.
    c)a supernova.
    d)a black hole.
    e)a neutron star.
    a)a neutron star.
  • David Gauch
    Answered in Final Study Guide
    What is the upper limit to the mass of a white dwarf?
    a)1 solar mass
    b)There is no upper limit
    c)There is an upper limit, but we do not yet know what it is
    d)2 solar masses
    e)1.4 solar masses
    e)1.4 solar masses
  • David Gauch
    Answered in Final Study Guide
    How do we know that pulsars must be neutron stars?
    a)Telescopic images of pulsars and neutron stars look exactly the same
    b)No massive object, other than a neutron star, could spin as fast as we observe pulsars to spin and remain intact.
    c)We have observed massive-star supernovae produce pulsars.
    d)This is only a theory that has not yet been confirmed by observations
    e)Pulsars have the same upper mass limit as neutron stars do.
    b)Pulsars have the same upper mass limit as neutron stars do.
  • David Gauch
    Answered in Final Study Guide
    A teaspoonful of white dwarf material on earth would weigh
    a)about the same as Mt. Everest.
    b)a few grams.
    c)about the same as the Earth.
    d)a few pounds.
    e)a few tons.
    e)a few tons.
  • David Gauch
    Answered in Final Study Guide
    Which of the following best describes what would happen if a 1.4 solar mass neutron star, with a diameter of a few kilometers were suddenly to appear in your hometown?
    a)It would rapidly sink to the center of earth
    b)The combined mass of earth and the neutron star would cause the neutron star to collapse into a black hole.
    c)The entire mass of the Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star.
    d)It would crash through the earth, creating a large crater, and exit the Earth on the other side.
    e)It would crash into the earth, throwing cast amounts of dust into the atmosphere which in turn would cool the earth. such a scenario is probably what cased the extinction of the dinosaurs.
    c)It would crash into the earth, throwing cast amounts of dust into the atmosphere which in turn would cool the earth. such a scenario is probably what cased the extinction of the dinosaurs.
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Free Quiz Question From Final Study Guide
Question: Which is closest to the temperature of the Sun's core?
Answer:
100,000 K
100 million K
10 million K
10,000 K
1 million K