Astronomy 11 – Flashcards
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From inside out, which in the correct order for the structure of the sun?
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Core, radiative zone, convective zone, chromosphere
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The speed of light is 3.00 x 10^8 m/s. If 2.00 kg of mass is converted to energy, how much energy will be produced?
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1.80 x 10^17 J (E= MC^2)
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The most striking example of solar variability was the
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Maunder Minimum from 1645-1715
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Granulation is the most obvious proof of solar convective energy transport.
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True
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The solar wind is constantly removing mass from the sun.
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True
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The solar neutrino problem is that we observe more neutrinos than predicted.
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False
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The solution to the solar neutrino problem was
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2/3 of the neutrinos transform into a new type during the 8 minute trip to Earth.
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Visible sunspots lie in the
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granulation in the photosphere
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During a period of high solar activity, most sunspots lie near the sun's
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equator
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While observing the Sun, you note a large number of sunspots. What can you conclude?
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There are likely to be an average number of flare and prominences.
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As the sun rotates, an individual sunspot can be tracked across its face. From eastern to western limb this take about
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two weeks
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Sunspots are dark splotches on the Sun. Which statement is true?
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They are extremely hot, but cooler than the surrounding areas of the sun.
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In the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen. What happens to the "lost" mass?
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It is converted to energy.
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Suppose a large flare is detected optically. How long until radio interference arrives?
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Stimultaneously
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In the proton-proton cycle, the positron
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an anti-electron
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Compared to the underlying photosphere and chromosphere, the corona is ___________ temperature
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much hotter
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The temperature of the photosphere is about
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5800 K
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The outward pressure of hot gas in the sun
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is balance by the inward gravitational pressure
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The strongest magnetic fields in the photosphere lie near
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sunspots
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What is the meaning of the solar constant?
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the amount of energy the Earth receives per unit area and unit time
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What two energy transport mechanisms, in order from outside the core to the surface, are found in the Sun?
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radiation, convection
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Which is the net result of the proton-proton chain?
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4 protons --> 1 Helium 4+2 neutrinos +gamma rays
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During a period of high solar activity, the corona
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is more irregular
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The critical temperature to initiate the proton-proton cycle in the cores of stars is
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10 million K
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The only particle we can directly observe coming out of the sun's core is the
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neutrino
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Nuclear _____ explains the sun's immense and sustained energy output.
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fusion
