Plasmas/Plasma objects/Coronal clouds/Quiz

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This image is taken in Hα of the Sun and above showing a cloud above a sunspot. Credit: Alan Friedman.

Coronal clouds is a lecture and an article about a specific astronomical entity, a type of plasma meteor. It is also a part of the department of astronomy course on the principles of radiation astronomy.

You are free to take this quiz based on coronal clouds at any time.

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

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Quiz

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

1. True or False, The Chamaeleon I cloud is a coronal cloud.

TRUE
FALSE

2. Which of the following are green radiation astronomy phenomena associated with the Sun?

the color of the upper rim as seen from Earth
an excess brightness at or near the edge of the Sun
the iron XIV green line
neutron emission
polar coronal holes
meteor emission
changes in the line-blanketing

3. The population of coronal loops can be directly linked with the?

4. Which of the following is a prominent feature associated with solar clouds?

coronal mass ejections
rotation
magnetic clouds
coronal clouds
plasma
magnetic field lines

5. True or False, Coronal loops project into the coronal cloud, through the transition region and the chromosphere.

TRUE
FALSE

6. Which of the following is not a characteristic of solar active regions?

lithium
nucleosynthesis
coronal clouds
spot central meridian passage
a surface coverage of at least 95%.

7. About one third of ejecta observed by satellites at Earth is composed of what?

8. True or False, Coronal clouds are irregular objects suspended in the corona with matter streaming out of them into nearby active regions.

TRUE
FALSE

9. Which of the following are X-radiation astronomy phenomena associated with the Sun?

a core which emits neutrinos
a solar wind which emanates out the polar coronal holes
gravity
the barycenter for the solar system
polar coronal holes
coronal clouds
its position
temperatures at or above 1 MK

10. True or False, The Ca XV emission line is a yellow coronal line at 569.4 nm.

TRUE
FALSE

11. Which of the following are associated with X-radiation?

spans three decades in wavelength
spans three decades in frequency
spans three decades in energy
emitted by 26Al
coronal clouds
60 keV electromagnetic radiation
90 eV electromagnetic radiation
visually dark source

12. True or False, The Milky Way has its own coronal cloud.

TRUE
FALSE

13. Complete the text:

The photosphere of the Sun has an effective temperature of yet its corona has an average temperature of . The high temperature of the corona shows that it is heated by something other than direct from the photosphere.

14. True or False, In a coronal cloud are magnetohydrodynamic plasma flux tubes along magnetic field lines.

TRUE
FALSE

15. Which of the following are X-ray astronomy phenomena that may be associated with the Sun?

coronal cloud
hot regions of 8–20 x 106 K
fluorescence of Jovian X-rays
lightning
X-rays from rings
collisions with the Jovian wind
soft X-ray emission
hard X-ray emission

16. True or False, The hot ionized medium (HIM) consists of a coronal cloud which emits X-rays.

TRUE
FALSE

17. Complete the text:

Discussion of the alternative hypothesis of cloud ejection from the equatorial layer of the Galaxy leads to the conclusion that the halo must be highly and that the coronal clouds are probably regions.

18. True or False, 3C 295 is a galaxy cluster filled with a vast cloud of 50 MK gas and plasma.

TRUE
FALSE

19. Pick the following sources that are or are likely to contain a coronal cloud?

AGNs
gamma-ray source
dark nebula
lightning
X-ray source
molecular cloud
soft X-ray emission source
hard X-ray emission

20. True or False, Coronal clouds, type IIIg, form in space above a spot area and rain streamers upon it.

TRUE
FALSE

Your score is 0 / 0

Research

Hypothesis:

  1. Solar flares occur be fore coronal clouds.

Control groups

This is an image of a Lewis rat. Credit: Charles River Laboratories.

The findings demonstrate a statistically systematic change from the status quo or the control group.

“In the design of experiments, treatments [or special properties or characteristics] are applied to [or observed in] experimental units in the treatment group(s).[1] In comparative experiments, members of the complementary group, the control group, receive either no treatment or a standard treatment.[2]"[3]

Proof of concept

Def. a “short and/or incomplete realization of a certain method or idea to demonstrate its feasibility"[4] is called a proof of concept.

Def. evidence that demonstrates that a concept is possible is called proof of concept.

The proof-of-concept structure consists of

  1. background,
  2. procedures,
  3. findings, and
  4. interpretation.[5]

See also

References

  1. ↑ Klaus Hinkelmann, Oscar Kempthorne (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley. ISBN 978-0-471-72756-9. http://books.google.com/?id=T3wWj2kVYZgC&printsec=frontcover.
  2. ↑ R. A. Bailey (2008). Design of comparative experiments. Cambridge University Press. ISBN 978-0-521-68357-9. http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521683579.
  3. ↑ "Treatment and control groups, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. May 18, 2012. Retrieved 2012-05-31.
  4. ↑ "proof of concept, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. November 10, 2012. Retrieved 2013-01-13.
  5. ↑ Ginger Lehrman and Ian B Hogue, Sarah Palmer, Cheryl Jennings, Celsa A Spina, Ann Wiegand, Alan L Landay, Robert W Coombs, Douglas D Richman, John W Mellors, John M Coffin, Ronald J Bosch, David M Margolis (August 13, 2005). "Depletion of latent HIV-1 infection in vivo: a proof-of-concept study". Lancet 366 (9485): 549-55. doi:10.1016/S0140-6736(05)67098-5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894952/. Retrieved 2012-05-09.

External links

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Development status: this resource is experimental in nature.
Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
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