In Quest of the Universe, 5e: Explorations

Title Text: In Quest of the Universe, Fourth Edition

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Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: Astronomers are interested in solar neutrinos because neutrinos carry with them information about
	A: the Sun's convection region.
	B: helium "burning" in the Sun's core.
	C: the nuclear processes in the Sun's core.
	D: the processes occurring on the Sun's surface.
	E: the Sun's rotation.

2: Solar flares
	A: result from changes in the nuclear reactions in the Sun's core.
	B: are the result of nuclear explosions in the photosphere.
	C: can last up to a few hours.
	D: are caused by the turbulent magnetic field of the Sun.
	E: (Both C and D.)

3: Prominences
	A: result from sudden releases of nuclear energy from the photosphere.
	B: are often associated with sunspots.
	C: are the sudden brightenings of twisted gas tubes near sunspots.
	D: are prominent regions of hot gas near sunspots.
	E: result from sudden releases of energy from the Sun's radiative zone.

4: The energy produced in the Sun's core takes hundreds of thousands of years to reach the surface. That is because
	A: the material in the Sun is nearly opaque.
	B: of the high value of the speed of light.
	C: photons are absorbed and reemitted many times as they travel from the Sun's core.
	D: each reemission of a photon is in a random direction.
	E: (All of the above.)

5: Sunspots are associated with
	A: areas of the highest temperature on the Sun's surface.
	B: the 11-yr solar cycle.
	C: areas of high temperature in the regions below them.
	D: (Both B and C but not A.)
	E: areas of weak magnetic fields.

6: The Sun's limb appears darker than the center of the solar disk because
	A: light from the disk's center originates in a deeper layer in the Sun's atmosphere than light from the limb.
	B: the photosphere is cooler than the chromosphere.
	C: the limb regions are farther from Earth compared to the disk's center.
	D: (All of the above.)
	E: (None of the above.)

7: In order of increasing temperature, which of the following is correct?
	A: base of chromosphere, photosphere, upper chromosphere, core, corona
	B: base of chromosphere, photosphere, upper chromosphere, corona, core
	C: photosphere, base of chromosphere, upper chromosphere, core, corona
	D: photosphere, base of chromosphere, upper chromosphere, corona, core
	E: photosphere, upper chromosphere, base of chromosphere, core, corona

8: If the temperature in the Sun's core were to somehow decrease,
	A: hydrogen nuclei will slow down and the rate of energy production will decrease.
	B: the Sun's core will start contracting because it will not be in hydrostatic equilibrium anymore.
	C: (Both A and B.)
	D: hydrogen nuclei will be able to get closer together and therefore the rate of energy production will increase.
	E: helium nuclei will speed up and the rate of energy production will decrease.

9: Observations of solar oscillations are an important tool for understanding the Sun because they allow us to
	A: better understand the internal conditions in the Sun.
	B: better understand the effect that magnetic fields have on sunspots.
	C: explain how granulation occurs.
	D: better understand the phenomena occurring on the Sun's surface.
	E: (All of the above but A.)

10: As a sunspot cycle progresses, the locations were sunspots form move
	A: from the middle latitudes in the northern hemisphere toward the middle latitudes in the southern hemisphere of the Sun.
	B: from the equator toward the polar regions.
	C: from the polar regions toward the equator.
	D: from the middle latitudes toward the equator.
	E: from the middle latitudes toward the equator in the north hemisphere but from the equator toward middle latitudes in the south hemisphere of the Sun.

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