CQ #1A (Intermediate)
We all know that the Sun is bright and hot--AND DON'T LOOK AT IT! But did
you know that one of the key things which shapes the Sun's behavior is
MAGNETISM? You'll find out more in the videos and hands-on Activities,
but--for now--where does the word "magnetism" come from? What's its root?
Answer:
Magnesium, in Asia Minor, where natural magnetized rocks ("magnetite") were
first recognized. Early writers called them "lodestones".
CQ 1B (Advanced)
The Sun is the source of light and life. The core of the Sun is 15,557,000
degrees Kelvin, and each second some 400 trillion, trillion, trillion
hydrogen atoms fuse together to release incredible amounts of energy. But
just how bright is it at the heart of the Sun?
Answer:
No brightness: at the center of the Sun "light" is only gamma rays, which
are below the wavelength of visible light, where we humans see color.
CQ #2A (Intermediate)
A multi-part math and data question: We say that the Sun is 8.3 light
minutes from Earth, and that the next nearest star, Alpha Centauri, is 4.3
light years from Earth. Just how many kilometers/miles are those two starsaway?
Answer:
The Sun is 149,600,000 kilometers or 93,000,000 miles away from Earth.
Alpha Centauri is 40,681,440,000,000 kilometers or 25,284,000,000,000 miles
away from Earth.
And how long would it take you to get from Earth to the Sun, and to Alpha Centauri, if you were traveling at many states' speed limit of 55 mph? At the speed of sound? At the speed of the Voyager spacecraft?
Answer:
It would take 1,690,909.09... hours (70,454.54... days and 193.0261519303
years) to reach the Sun from Earth traveling at 55 mph. It would take
459,709,090,909.09... hours (19,154,545,454.54... days and
52,478,206.7247... years) to reach Alpha Centauri from Earth traveling at
55 mph. It would take 120,801.0335917 hours (5,033.376399654 days and
13.79007232782 years) to reach the Sun from Earth traveling at the speed of
sound in normal room temperature air. It would take 32,850,000 000 hours
(1,368,750,000 days and 3,750,000 years) to reach Alpha Centauri from Earth
if you were traveling at the speed of sound in normal room temperature air.
The speed of sound in normal room temperature (68 degrees F or 20 degrees
C) air is 344 m/s.
It would take 1133.303274393 hours (47.22096976639 days and 0.1293725199079
years) to reach the Sun from Earth traveling at the speed of the Voyager 1
spacecraft and 1039.373246756 hours (43.30721861484 days and
0.1186499140133 years) traveling at the speed of the Voyager 2 spacecraft.
It would take 308112257.9544 hours (12838010.7481 days and 35,172.63218658
years) to reach Alpha Centauri from Earth if you were traveling at the
speed of the Voyager 1 spacecraft and 282,575,410.4407 hours
(11,773,975.43503 days and 32,257.46694528 years) traveling at the speed of
the Voyager 2 spacecraft. The velocity of the Voyager 1 spacecraft relative
to Earth is 36.685 km/sec (82,061 mi/hr) and the velocity of the Voyager 2
spacecraft relative to Earth is 40.000 km/sec (89,477 mi/hr)
CQ #2B (Advanced)
Energy is generated at the heart of the Sun through fusion reactions, yet
some of the radiation doesn't make it to the outer layers of the Sun for
some 170,000 years: why so?
Answer:
Radiation does not move quickly through the radiation zone. It diffuses
slowly outward in a haphazard or zig-zag motion becoming absorbed,
reradiated, and deflected repeatedly.
And a second travel time question: if spacecraft and telescopes can >see< explosive activity on the Sun, why do geomagnetic storms only hit Earth 2-3 days later?
Answer:
First neutrinos get released in fusion reactions--and since they don't
react to anything, they travel out to Earth at the speed of light, 300,000
km/s, and get here in 8 minutes. But they pass through Earth and us,
interacting with just about nothing, and going on their merry way. Up in
space, SOHO and TRACE see flares in visible and other wavelengths of
light--also 8 minutes after they happen. But matter--solar particles
emitted from the Sun--can't travel at the speed of light. They're matter,
not radiation. They take 2-3 days to get here, slowpokes at only 400-700
km/s, or 1,000,000 mph!
CQ #3A (Intermediate)
If, on a sunny day, you could only look down, what horticultural beauty
would tell you the Sun's position? Hint: the artist Van Gogh might help out
with this answer!
Answer:
Sunflowers
CQ #3B (Advanced)
If you said (as we've probably done several times in our Guide and
Factbook!) "all life on Earth depends on the Sun for existence", would
you--strictly speaking--be right or wrong?
Answer:
Both. Today you can find organisms around the deep-sea vents which live on
sulphur and heat-energy from undersea vulcanism, rather than sunlight and
photosynthesis. But without the mass of gas which formed the solar nebula
and out of which the Sun condensed, there'd be no gas and dust from which
the Earth and rocky planets formed... and hence no planet.
CQ #4A (Intermediate)
What's in a name? You can call this phenomenon by the same name as that of
the Goddess of the Dawn. Or you can say, more scientifically, that they are
the result of charged particles from the Sun interacting with Earth's
magnetic field. Either way they are a beautiful reminder that Earth's is
literally plugged into the Sun. What are they? And which culture gave this
name to that Goddess?
Hint: if you live in northern states you have an unfair advantage! But
during Solar Maximum students everywhere might get a chance to experience
this phenomenon for themselves.
Answer:
They are auroras. The Roman culture called the Goddess of the Dawn Aurora.
CQ #4B (Advanced)
The Sun flings 1 million tons of matter out into space every second forming
what we call the "solar wind." These winds travel from 400-750 or more
kilometers per second, a million miles per hour. Yet if you took a stroll
out in the solar wind you wouldn't even have to comb your hair. Why?
Answer:
The density of solar wind is only 10 particles per cubic centimeter
compared with 20 million, million, million particles per cubic centimeter
in our air on Earth.
CQ #5A (Intermediate)
A question where it will help to have students from different cultures in
your class! If not, don't worry--you just might have to use the Web to find
out.
(Hint, if you look through a pretty special Window you might find the answer.) What culture here in the Americas has a tradition where there are 5 Suns? And what culture in the East has a tradition where there are 10 Suns?
Answer:
The culture in the Americas is the Aztecs and the culture in the East is
the Chinese.
That pretty special Window where you might find the answer is of course the
Windows to the Universe site: http://www.windows.umich.edu/
CQ #5B (Advanced)
The sunlight that arrives here on Earth began its journey long ago and far
away, and took a journey with 3 distinctly different time-scales to get
here. Its trip is measured in (a) thousands of years (b) tens of years and
(c) minutes. Put some numbers to a, b, and c, and where the light was in
each period.
Answer:
150,000 plus years bouncing around in the radiation zone... 10 years in the
convection zone, 8.3 minutes to Earth.
CQ #6A (Intermediate)
I am the world's largest solar telescope. What is my name, where am I, and
who am I named after?
Answer:
The world's largest solar telescope is the McMath - Pierce Telescope which
is located just outside Tucson, Arizona at the National Solar Observatory
at Kitt Peak. The telescope was named after the late Dr. Robert R. McMath,
and Keith Pierce, whom students will see and hear during LIVE FROM THE SUN!
CQ #6B (Advanced)
I am the place where the Sun's and the Earth's gravity are in balance: what
is my name and where am I, and who or what "lives" here? And who's going to
come visit in the next few years?
Answer:
The position is Lagrangian Point L1, so called after the French
mathematician who pointed it out, Joseph Louis Lagrange (1736-1813). The
distance is a million miles from Earth. At this location satellites
maintain their relative position more or less in line with Earth, so it
sees the Sun all the time, and also maintains contact with Earth. SOHO and
ACE are currently located here. TRIANA, which is scheduled to be launched
by the end of the calendar year 2000, will be located here.
CQ #7A (Intermediate)
Of course we all know the Sun is much too hot to be home to any living
creatures, but during every 11 year solar cycle something does appear and
disappear, which we call by the name of a beautiful organism we can see
around us on Earth. What creature are we talking about?
(Hint: would it help to say that some people call the Sun the monarch of
the solar system?
Might another hint be that Alice in Wonderland might have confused them
with slices of bread? And if students take that hint, why were they
watching TV Sunday night rather than doing homework?)
Answer:
The so-called Butterfly Diagram, which depicts how sunspots cluster in the
Sun's northern and southern hemispheres, and certainly do look like the
open wings of a butterfly. Of course, the hint was to the Monarch
butterfly, and to Alice's adventures with butterflies made out of slices of
buttered bread!
CQ #7B (Advanced)
Can you ever find H2O on the Sun? If so, how and why?
Point 1:
Surprising as it may seem, some researchers say they have certain evidence
of superheated steam in the relatively cooler sunspot regions. You will
find the complete story at: http://solar-center.stanford.edu/sunwater.html
Point 2:
And since SOHO has shown us images of comets falling into the Sun, at least
as they vaporize, there's some water--even if not for very long--in the
Sun's outer atmosphere.
CQ #8A: (Intermediate)
"What's in a name? A rose by any other name would smell as sweet?"
I'm a feature on the Sun which is called 2 different things, depending on
whether you see me (NO, DON'T GO OUT AND LOOK DIRECTLY AT THE SUN!)
silhouetted off the Sun's disk against dark space, or on the disk itself.
But I'm really just the same feature: researchers just call me different
things depending on where they see me. What's my name?
And for a bonus point, who wrote that quote? (Hint: this literary comeback
kid should be getting quite a boost from the Oscars.)
ANSWER:
Off the disk I'm called a prominence, and on the disk a filament. And it
was Shakespeare, always in love with words, who wrote the quote.
Just about everyone knew the quote came from Shakespeare (My students who
missed the answer to the largest solar telescope on the LFSUN poster found
this answer on a poster in one of the classrooms.), but no one knew thefeature.
CQ #8B: (Advanced)
There's a foreign language word which is used to describe bright regions
around sunspots. The language is that which would have been spoken by the
inventor of the coronagraph.
What's the word? And what does it mean?
What's the language?
And who was the inventor?
ANSWER:
The word is plage, French for beach and the inventor was Bernard Lyot!