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Astronomy chp 11

The Sun, Our Star

QuestionAnswer
What is the avg distanc of the Earth to the Sun: 1.5 x 10 km, 9.3 x 10 miles, 1 AU all of above
What is the approximate temperature of the Sun’s surface? 6,000 K
Near the Sun’s core, the energy is mainly transported by: photons, radiation pressure, protons, convection photons
In the outer part of the Sun, just below the photosphere, the energy is transported mainly by: convection, radiation, x-rays, visible light convection
Studying the solar neutrinos is a way to probe: chromosphere, corona, magnetic field, core the sun's core
What prevents the Sun from further collapsing under it’s own gravity? gas pressure genenrated by high temperatures
Which of the following statements is true about the Sun’s chromosphere? chromosphere part of atmosphere, chromosphere above photosphere, base is cooler than top all of the above
Which of the following statements is true about the Sun’s corona? is the upper part of atmosphere, has very tenuous gas, temp is higher than the sun's surface all of the above
inward force of gravity is balanced by the outward for created by the gas pressure at the interior Hydrostatic Equilibrium
Which of the following parts of the Sun has the lowest temperature? corona, photosphere, top of chromosphere, bottom of chromosphere bottom of chromosphere
Which of the following statements about solar neutrinos is not true? produced by proton-proton chain, interaction is weak, carry electric charge, provide info on interior, carry energy carry electric charge
What is the reason for building neutrino detectors as deep as possible in the ground? ensure that the highly penetrating neutrinos are the only form of radiation to reach the detectors
What is a possible explanation for the high temperature of the solar corona? magnetic waves from Sun cause particles to move faster
Which of the following statements about solar prominences is true? are plumes of cooler gas and manifestations of magnetic disturbances
Which of the following statements about the sunspot cycle is true? number of spots rises and fall every 11 years & magnetic polarity repeats every 22 years
Which of the following statements regarding sunspots is not correct? sunspots are heated by magnetic field to temp of 4800 K
Which of the following statements regarding the Sun’s rotation is correct? does not rotate, rotates about its axis once every 24 hours, rotates like a solid object, objeys Kepler's law none are correct
The temperature at the Sun’s core is about _____. 15,000,000 K (largest number listed)
Light travels about _____ to reach the Sun’s surface from the Sun’s core, and about ____ to reach the Earth from the Sun’s surface. 16 million; 8 minutes
____ provides a way to measure the speed of seismic waves in the Sun. Dopler effect
the sun's rotation is about ________ in the equator and ________ in the poles 25 days/ 35 days
The maunder is a period _______, and coincides with _______. low sunspot activity; "little ice age"
Which method is employed in the determining the Sun’s speed of motion of solar oscillation (solar quakes)? doppler shift, Zeeman, Newton/Kepler, Radar, distance/angular Doppler shift
Which method is employed in the determining the Sun’s speed of motion in granules)? doppler shift, Zeeman, Newton/Kepler, Radar, distance/angular Doppler shift
Which change pattern matches the change in density below chromosphere? increases steadily inward
Which change pattern matches the change in density below corona? increases steadily inward
Which change pattern matches the change in temperature below corona? doesn't follow any pattern
Which change pattern matches the change in temperature above photosphere? doesn't follow any patter
The polarity of leading spot reversing in the hemisphere takes _____ years. every 11 years
The cycle of solar flares takes _____ years. every 11 years
The repeat cycle of polarity of leading spot in the hemisphere takes _____ years. every 22
The rotation period in the equator hemisphere takes _____ years. 25
The cycle of prominences takes _____ years. every 11
The rotation period near poles takes _____ years. 35
Where on the Sun are spicules located? photosphere, chromosphere, corona, just below photosphere chromosphere
Where on the Sun are holes located? photosphere, chromosphere, corona, just below photosphere corona
Created by: edeboo
 

 



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