Stars/Sun/Heliognosy/Quiz

This computer-generated diagram of internal rotation in the Sun shows differential rotation in the outer convective region and almost uniform rotation in the central radiative region. Credit: Global Oscillation Network Group (GONG).

Heliognosy is a lecture and an article focusing on the structure and composition of the Sun. It is a lecture as part of the radiation astronomy course on solar astronomy.

You are free to take this quiz based on heliognosy 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 {{radiation astronomy resources}} template. This should give you adequate background to get 100 %.

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Quiz

Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:

1 Yes or No, The Sun is sometimes called Sol and other times Helio.

	Yes
	No

2 True or False, Boron is the third most abundant element detected on the Sun.

	TRUE
	FALSE

3 Complete the text:

Hoyle notes that he and others in the circles to which he was privy continued until after the to believe that the Sun was made mostly of internally.

4 Yes or No, Astronomy of the Sun may be called helionomy.

	Yes
	No

5 True or False, Hydrogen has an emission line in the cyan.

	TRUE
	FALSE

6 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

7 Yes or No, Until after the Second World War some continued to believe that the Sun was made mostly of iron.

	Yes
	No

8 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 .

bow shock .

weakly ionized, relatively cold and dense plasma .

X-ray emission .

normally invisible .

circular mass movement of plasma .

coolest layer of the Sun .

shear between different parts of the Sun that rotate at different rates .

above the photosphere .

transition from almost uniform to differential rotation .

150 g/cm3 .

ultraviolet emission .

9 Yes or No, The high-hydrogen, low-iron model was suddenly adopted without opposition.

	Yes
	No

10 Yes or No, The radiation zone or radiative zone is a layer of a star's interior where energy is primarily transported toward the exterior by means of radiative diffusion, rather than by convection.

	Yes
	No

Hypotheses

Main resource: Hypotheses

1. The center of the Sun could still be made of iron and be the source of the global magnetic field.

See also

• Astrognosy/Quiz
• Heliocentric astronomy/Quiz
• Heliogony quiz
• Heliography quiz
• Heliology quiz
• Heliometry quiz
• Heliophysics quiz
• Heliospheres quiz

External links

{{Radiation astronomy resources}}