Stars/Sun/Heliospheres/Quiz

< Stars < Sun < Heliospheres
This artist's concept shows plasma flows around NASA's Voyager 1 spacecraft as it approaches interstellar space. Credit: NASA/JPL.

Heliospheres is a lecture from the astronomy department that describes the heliosphere around the Sun.

This quiz which you are free to take at any time is based on this lecture.

To improve your score, read and study the lecture, the links contained within, listed under See also, and in the astronomy resources 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

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Ignore the questions' coefficients:

1. 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 .

2. Which of the following may not be able to slow down an object entering the heliosphere at 20 km/s?

gravity
electrostatic repulsion
the charge on the surface of the Sun
a comparable charge on the incoming object
electromagnetics
strong forces

3. Complete the text:

Match up the structure of the proto-Sun with the heliogonic 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
apparent outer surface .
just above the radiative zone .
top of the radiative zone .
part of the heliosphere .
below the corona and above the photosphere .
below the protostar's radiative zone .
coolest layer in the protoplanetary disc .
shear between different parts of the Sun that rotate in the radiative zone .
above the photosphere .
transition from almost uniform to differential between radiative and convective zones .
probably not differentiated as a protostar .
between the protoplanetary disc and the heliosphere .

4. Which phenomena are associated with the heliosphere?

a region of space where the interstellar medium is blown away by the solar wind
a bubble in space
virtually all the material emanates from the Sun itself
Voyager 2
Voyager 1
the termination shock

5. The point where the interstellar medium and solar wind pressures balance is called the

6. Complete the text:

Match up the item letter with each of the possibilities below:
Balloons - A
Sounding rockets - B
Aircraft assisted launches - C
Orbital rocketry - D
Shuttle payload - E
Heliocentric rocketry - F
Exploratory rocketry - G
Lunar rover - H
Ranger 5
microcalorimeter arrays .
MeV Auroral X-ray Imaging and Spectroscopy .
Lunokhod 2 .
ALEXIS .
Ulysses .
Broad Band X-Ray Telescope .
Solar Heliospheric Observatory .

7. Measurements from Voyager 1 revealed a steady rise since May in collisions with?

8. Complete the text:

At the same time, in late , there was a dramatic drop in collisions with , which are thought to originate from the .

9. Which of the following is not a characteristic of the heliosphere?

outward speed of the solar wind diminishes to zero
inward pressure from interstellar space is compacting the magnetic field
the solar wind even blows back at us
a 100-fold increase in the intensity of high-energy electrons from elsewhere in the galaxy diffuse into our solar system from outside
the source of heat that brings the coronal cloud near the Sun hot enough to emit X-rays may be the photosphere

Your score is 0 / 0

Research

Hypothesis:

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

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

This is a research project at http://en.wikiversity.org

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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