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Draft:Original research/Regions/Quiz

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This image shows the spectacular star-forming region known as the Flame Nebula. Credit: ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit.

Regions is a lecture where star-forming regions and stellar active regions are an aspect of stellar astronomy and regional astronomy. Star-forming regions is part of the astronomy course on the principles of radiation astronomy.

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

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1 Which of the following are phenomena usually associated with a heliostat?

geographic coordinates
a mirror which turns so as to keep reflecting sunlight toward a predetermined target
the target is usually stationary
computer control
a two-axis motorized system
altitude

2 Active regions are the result of enhanced what?

3 True or False, Most stellar flares and coronal mass ejections originate in magnetically inactive regions around visible sunspot groupings.

TRUE
FALSE

4 Complete the text:

Most

and

originate in magnetically

around visible

groupings.

5 True or False, "[A] spicule is a dynamic jet of about 500 km diameter in the chromosphere of [a star]."

TRUE
FALSE

6 Which of the following are associated with the stellar active region control group?

solar cycle
closed magnetic structures
solar wind
long-lived loop arcades
helmet streamers
the Sun

7 A super flare on the evening of August 28, 1859, was recorded by

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

TRUE
FALSE

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

ultraviolet emission
X-ray emission
gamma-ray emission
neutron emission
7Be emission
meteor emission

10 Using a coordinate system, sunspot passage is generally noted by what meridian?

11 True or False, "75% of the naked sunspots represented the return of large dominant f spots which had been part of large active regions during previous rotations."

TRUE
FALSE

12 Which geographical phenomena are associated with stellar active regions?

moving across the surface of the Sun or star
manifesting intense magnetic fields
a north geographic and magnetic pole
rotation
a prime meridian
average starspot latitudes
the solar or stellar equator

13 True or False, A star-forming region is a region of the celestial sphere within which predominately very young stellar objects (YSOs) are located and their formation is likely occurring.

TRUE
FALSE

14 Coronal loops extend high into the corona, project through the chromosphere, and project through what above the photosphere?

15 True or False, Coronal loops populate both active and quiet regions of the solar surface.

TRUE
FALSE

16 Phenomena associated with nanoflares?

1017 Joules
very high X-ray emission from happening every 20 s
flickerings
brightenings
mass eruptions
active regions

17 Main sequence variable stars of late spectral types, usually K or M, exhibiting variations in luminosity due to rotation, starspots and other chromospheric activity are called.

18 True or False, RS Canum Venaticorum variables are close binary stars having active chromospheres which can cause large stellar spots.

TRUE
FALSE

19 The star-forming phenomena related to RCW 79 are which of the following?

a bubble is 70-light years in diameter
the southern Milky Way
the radiation and winds of hot young stars
the hot bubble expands into the interstellar gas and dust around it
new stars along the edge of the large bubble

20 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%.

21 VISTA is the world’s largest survey

22 Which of the following are observatories on Earth?

Chandra X-ray Observatory
Big Bear
TRACE
Kodaikanal
the Hubble
Lomnický štít
McMath-Pierce
SOFIA

23 Sayan Observatory is located in.

24 True or False, The solar neutron detector located at Mt. Norikura observatory, Japan, is made of plastic scintillators.

TRUE
FALSE

25 Which of the following are associated with the McMath-Pierce Solar Telescope?

a launch location
Kitt Peak National Observatory
a heliostat
a distinctive diagonal shaft that continues underground
a theoretical resolution of 0.07"
NOAA designations

26 The type star that goes through fairly extreme changes of brightness: for instance, in 1952, its brightness increased by 75 times in only 20 seconds, is what star?

27 True or False, T Tauri stars are likely to have large areas of starspot coverage.

TRUE
FALSE

28 Which of the following observatories are solar observatories?

The Huairou Solar Observing Station in China
Mauna Loa Solar Observatory
Los Alamos National Solar Laboratory
National Solar Observatory
Mees Solar Observatory
CERN

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

30 True or False, A spotless flare may occur in a plage region during its first rotation.

TRUE
FALSE

31 Which of the following are solar observatory satellites?

Einstein Observatory
OSO 7
Hinode
High Energy Astronomy Observatory 1
Koronas-Foton
STEREO

32 Suborbital solar probing may be accomplished from different geographical locations using?

33 True or False, The Mauna Kea Observatories are used for scientific research across the electromagnetic spectrum from visible light to radio, and comprise the largest such facility in the world.

TRUE
FALSE

34 Which stars of the alpha Centauri system are known to have stellar active regions?

Proxima Centauri
Alpha Centauri B
Barnard's star
Alpha Centauri A
Rigel Kent
Alpha Centauri C
Alpha Centauri D

35 True or False, The Norikura Solar Observatory uses its own designations for solar active regions rather than those of other observatories or NOAA.

TRUE
FALSE

36 When faculae are present, what characteristics are readily observed?

bright spots
bright patches
starspots
magnetic poles
arising in the photosphere
neon clouds

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

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

TRUE
FALSE

39 Chemistry phenomena associated with star-forming regions are

silicate dust
pressure
hydrogen molecules
polycyclic aromatic hydrocarbons (PAHs)
oxygen
sulfur

40 Which of the following is not a prominent contributor associated with a variable star?

star spots
chromospheric activity
rotation
brightness fluctuations
flares
spot coverage fraction

41 In general there is no proper motion at all in the plage or the surrounding?

42 Yes or No, "Some prominences break apart and give rise to coronal mass ejections."

Yes
No

43 During the late 1600s the sunspot cycle lost its usual intensity and became what?

44 Complete the text:

Ultraviolet radiation and stellar

from Eta Carinae and its siblings have shredded the

to pieces, leaving a mess of tendrils and

.

45 True or False, Naked sunspots seen in Hα which are devoid of plage are never associated with coronal holes.

TRUE
FALSE

46 Complete the text:

Match up the type of radiation with each of the star-forming possibilities below:
Spitzer infrared - A
VISTA infrared - B
visual - C
XMM-Newton X-rays - D
ultraviolet - E
ESO visual - F
NGC 346

.
NGC 2024

.
HH 46/47

.
NGC 2264

.
R136

RCW 79

.

47 Which of the following is not a phenomenon usually associated with regions?

a connected part of a space
a tract of land
definite extent
Van Maanen's star
temporal change in radiation flux
weather

48 Complete the text:

"When a prominence is viewed from a different perspective so that it is against the

instead of against space, it appears

than the surrounding

.

49 True or False, In 1947, G. E. Kron proposed that starspots were the reason for periodic changes in brightness on blue dwarfs.

TRUE
FALSE

50 Complete the text:

Match up the image with the star-forming regions:
Messier 17 - A
RCW 79 - B
Flame Nebula - C
Cone Nebula - D
NGC 1999 - E
R136 - F
HH 46/47 - G
RCW 108 - H
Carina Nebula - I
NGC 3582 - J
NGC 1097 - K
Hubble-X - L
NGC 6334 - M
Arp 220 - N
Sh 2-106 - O
Rho Ophiuchi complex - P
Ghost Head Nebula - Q
NGC 2366 - R
NGC 2363 - S
Dragonfish nebula - T

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

51 Which of the following is not a phenomenon associated with a flip-flop cycle?

active regions
hemisphere shifts
binary RS CVn stars
single stars
cyclical period
meridian passage

52 A Mt. Wilson spot number usually corresponds with which other region number?

53 True or False, Hale region numbers are greater for the same regions than NOAA numbers.

TRUE
FALSE

54 Which of the following is not associated with R136?

hundreds of brilliant blue stars
the Milky Way
warm, glowing clouds
the largest stellar nursery in our local galactic neighborhood
the 30 Doradus Nebula
a fantasy landscape of pillars, ridges, and valleys

55 True or False, NGC 346 is a star-forming cloud.

TRUE
FALSE

56 Which of the following is not a star-forming region?

Messier 17 sky region
RCW 79
NGC 2024
Local Void
NGC 2264
NGC 6503

57 The Sun as a star has what geographical property?

it's a primordial population III star
it passes once a year across the Lockman Hole
silicates have been discovered in its interior structure
optical reflectance studies have found evidence of magnesium
it has a surface temperature of ~700 K
it has a longitude and latitude grid system for locating active regions

58 Which of the following active region phenomena have been observed on Proxima Centauri?

flares
temperatures as high as 27 MK
quiescent X-ray luminosity comparable to the Sun
a surface coverage of about 88%
spicules
likely prominence

59 Solar observation is performed all around the surface of the Earth by?

60 True or False, The Kodaikanal Solar Observatory is a solar observatory owned and operated by the Indian Institute of Astrophysics.

TRUE
FALSE


Hypotheses

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  1. Questions can help delineate the necessity of a region for a dominant group.

See also

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