Plasmas/Plasma objects/Coronal clouds/Quiz

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, 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
{Yes or No, The Chamaeleon I cloud is a coronal cloud. + Yes - No
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{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
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{The population of coronal loops can be directly linked with the? { solar cycle (i) }
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{Which of the following is a prominent feature associated with solar clouds? + coronal mass ejections - rotation + magnetic clouds + coronal clouds + plasma + magnetic field lines
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{True or False, Coronal loops project into the coronal cloud, through the transition region and the chromosphere. + TRUE - FALSE
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{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%.
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{About one third of ejecta observed by satellites at Earth is composed of what? { magnetic clouds (i) }
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{True or False, Coronal clouds are irregular objects suspended in the corona with matter streaming out of them into nearby active regions. + TRUE - FALSE
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{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
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{True or False, The Ca XV emission line is a yellow coronal line at 569.4 nm. + TRUE - FALSE
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{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
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{True or False, The Milky Way has its own coronal cloud. + TRUE - FALSE
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{Complete the text: The photosphere of the Sun has an effective temperature of { 5570 K|5,570 K (i) } yet its corona has an average temperature of { 1-2 MK|1-2 x 106 K (i) }. The high temperature of the corona shows that it is heated by something other than direct { direct heat conduction (i) } from the photosphere.
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{True or False, In a coronal cloud are magnetohydrodynamic plasma flux tubes along magnetic field lines. + TRUE - FALSE
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{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
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{True or False, The hot ionized medium (HIM) consists of a coronal cloud which emits X-rays. + TRUE - FALSE
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{Complete the text: Discussion of the alternative hypothesis of cloud ejection from the equatorial layer of the Galaxy leads to the conclusion that the { gaseous (i) } halo must be highly { turbulent (i) } and that the coronal clouds are probably { H I|HI (i) } regions.
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{True or False, 3C 295 is a galaxy cluster filled with a vast cloud of 50 MK gas and plasma. + TRUE - FALSE
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{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
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{True or False, Coronal clouds, type IIIg, form in space above a spot area and rain streamers upon it. + TRUE - FALSE
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Hypotheses

 * 1) Solar flares occur before coronal clouds.