Stars/Sun/Heliophysics/Quiz

In the model shown at right the Sun and hypothetical regions around it are labeled.

Heliophysics is the physics or astrophysics of the closest star to the Earth. It is a lecture from the radiation astronomy department. This is a quiz based on this lecture heliophysics that you are free to take at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the template. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

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To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!

Quiz
{True or False, A basic unit of length for measuring the diameter of the Sun is the kilometer. + TRUE - FALSE
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{True or False, By assuming gravity causes the Earth and Sun to orbit each other, and assuming a mass for the Earth, a mass for the Sun can be determined from the orbital characteristics. + TRUE - FALSE
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{True or False, By correlating the length of an Earth year to a fixed number of seconds, the length of time of a second can be determined. + TRUE - FALSE
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{Yes or No, The Sun could have an internal core of iron that generates its bipolar magnetic field. + Yes - No
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{True or False, As the principal portion of the sunspot cycle corresponds well with a periodic conjunction of Venus and Jupiter, the increased electron flux to the Sun may cause the magnetic poles to reverse. + TRUE - FALSE
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{Complete the text: Hoyle notes that he and others in the { astronomical (i) } circles to which he was privy continued until after the { Second World War (i) } to believe that the Sun was made mostly of { iron (i) } internally.
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{The core of the Sun was believed to be made mostly of iron to explain what? - the source of neutrinos + the Sun's global magnetic field + the existence of magnetic poles like the Earth - the rotation of the Sun - surface differential rotation of the Sun + magnetic field reversals like the Earth
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{Complete the text: Match up the structure of the Sun with the characteristic or property: radiative zone - L core - M convection zone - N dynamo - O tachocline - P photosphere - Q atmosphere - R temperature region - S chromosphere - T transition region - U corona - V heliosphere - W diffusion rather than convection { L (i) }. bow shock { W (i) }. weakly ionized, relatively cold and dense plasma { Q (i) }. X-ray emission { V (i) }. normally invisible { T (i) }. circular mass movement of plasma { N (i) }. coolest layer of the Sun { S (i) }. shear between different parts of the Sun that rotate at different rates { O (i) }. above the photosphere { R (i) }. transition from almost uniform to differential rotation { P (i) }. 150 g/cm3 { M (i) }. ultraviolet emission { U (i) }.
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{What features occasionally show a heliographic distribution on the surface of the Sun? - granulation or supergranulation + active regions + coronal holes + the north an south heliographic poles + sunspots + latitudinal bands that rotate at different rates
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{What effects does the distribution of angular momentum in the solar system have on the origin of the Sun? - an initially spherical and contracting nebula spinning faster as it collapses would produce the present situation in the solar system + partitioning mass and angular momentum does not seem possible with a contracting nebula + the rotation axis of the Sun from that of the system as a whole if formed by nebular collapse seems very unlikely + the angular-momentum problem does not arise with the accretion theory - surface differential rotation of the Sun results + by the nature of the floccule process the star so formed will have little angular momentum
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Hypotheses

 * 1) Timing the Sun is like timing a ball of gas.