Question 1

Nuclei of atoms are held together by gravity.

Accepted Answer

A) True 
 B)False  False

Question 2

By studying how the surface of the Sun vibrates like a struck bell we can determine its

Accepted Answer

A)  age. 
B)  interior density. 
C)  total mass. 
D)  size. 
A)  age. 
B)  interior density. 
C)  total mass. 
D)  size. B

Question 3

Balance of energy in the solar interior means that

Accepted Answer

A)  energy production rate in the core equals the rate of radiation escaping the Sun's surface. 
B)  the source of energy in the core is stable and will sustain the Sun for billions of years. 
C)  the outer layers of the Sun absorb and re-emit the radiation from the core at increasingly longer wavelengths. 
D)  radiation pressure balances the weight of the overlying solar layers. 
A)  energy production rate in the core equals the rate of radiation escaping the Sun's surface. 
B)  the source of energy in the core is stable and will sustain the Sun for billions of years. 
C)  the outer layers of the Sun absorb and re-emit the radiation from the core at increasingly longer wavelengths. 
D)  radiation pressure balances the weight of the overlying solar layers. A

Question 4

Which of the following layers of the Sun makes up the majority of its interior?

Accepted Answer

A)  The core 
B)  The radiative zone 
C)  The convective zone 
D)  The photosphere 
A)  The core 
B)  The radiative zone 
C)  The convective zone 
D)  The photosphere

Question 5

Light from the photosphere reaches Earth approximately __________ times faster than photons released in fusion in the core.

Accepted Answer

A)  1,000 
B)  600,000 
C)  1 million 
D)  6 billion 
A)  1,000 
B)  600,000 
C)  1 million 
D)  6 billion

Question 6

Explain why hydrostatic equilibrium results in the center of the Sun having the highest pressure and temperature.

Accepted Answer

Hydrostatic equilibrium means that,at an

Question 7

The solar spectrum is an example of a(n)__________ spectrum.

Accepted Answer

A)  emission 
B)  absorption 
C)  continuum 
D)  blackbody 
A)  emission 
B)  absorption 
C)  continuum 
D)  blackbody

Question 8

The solar neutrino problem was solved by

Accepted Answer

A)  adjusting the rates of hydrogen burning in solar models. 
B)  improving detector efficiencies so more neutrinos were observed. 
C)  postulating that neutrinos had mass and oscillated between three different types. 
D)  lowering the percentage of helium in models of solar composition. 
A)  adjusting the rates of hydrogen burning in solar models. 
B)  improving detector efficiencies so more neutrinos were observed. 
C)  postulating that neutrinos had mass and oscillated between three different types. 
D)  lowering the percentage of helium in models of solar composition.

Question 9

The Sun's internal magnetic field becomes tangled up over time because of

Accepted Answer

A)  coronal holes. 
B)  coronal mass ejections. 
C)  differential rotation. 
D)  All of the above 
A)  coronal holes. 
B)  coronal mass ejections. 
C)  differential rotation. 
D)  All of the above

Question 10

When solar activity is very high,the Earth's atmosphere will

Accepted Answer

A)  expand. 
B)  contract. 
C)  remain approximately the same. 
D)  repel charged particles. 
A)  expand. 
B)  contract. 
C)  remain approximately the same. 
D)  repel charged particles.

Question 11

If a coronal mass ejection occurs on the Sun that expels material at a speed of 800 km/s,how long will it take these charged particles to reach the Earth?

Accepted Answer

A)  0.7 day 
B)  1.4 days 
C)  1.8 days 
D)  2.1 days 
A)  0.7 day 
B)  1.4 days 
C)  1.8 days 
D)  2.1 days

Question 12

Which of the following are manifestations of solar magnetic activity?

Accepted Answer

A)  Sunspots 
B)  Prominences 
C)  Flares 
D)  All of the above 
A)  Sunspots 
B)  Prominences 
C)  Flares 
D)  All of the above

Question 13

The Sun's magnetic field reverses direction every

Accepted Answer

A)  27 days. 
B)  12 months. 
C)  11 years. 
D)  22 years. 
A)  27 days. 
B)  12 months. 
C)  11 years. 
D)  22 years.

Question 14

In the proton-proton chain,the net reaction is that 4 protons are converted into 1 helium nucleus.What other by-products are released in this reaction,and why?

Accepted Answer

Energy is released in the form of gamma

Question 15

If the Sun stopped nuclear fusion in its core,it would take 100 years for its luminosity to change.

Accepted Answer

A) True 
 B)False

Question 16

The opacity within the Sun is due primarily to the absorption and scattering of electromagnetic radiation by electrons in the Sun.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following methods is not used to transport energy from the core to the surface of the Sun?

Accepted Answer

A)  Radiation 
B)  Convection 
C)  Conduction 
D)  All of the above are important in the solar interior. 
A)  Radiation 
B)  Convection 
C)  Conduction 
D)  All of the above are important in the solar interior.

Question 18

When two atomic nuclei come together to form a new species of atom,it is called

Accepted Answer

A)  nuclear fission. 
B)  nuclear fusion. 
C)  nuclear splitting. 
D)  nuclear recombination. 
A)  nuclear fission. 
B)  nuclear fusion. 
C)  nuclear splitting. 
D)  nuclear recombination.

Question 19

In the proton-proton chain,the net reaction is that 4 hydrogen nuclei are converted to 1 helium nucleus and __________ are released.

Accepted Answer

A)  visible wavelength photons 
B)  gamma ray photons,positrons,and neutrinos 
C)  ultraviolet photons and neutrinos 
D)  X-ray photons,electrons,and neutrinos 
A)  visible wavelength photons 
B)  gamma ray photons,positrons,and neutrinos 
C)  ultraviolet photons and neutrinos 
D)  X-ray photons,electrons,and neutrinos

Question 20

The best wavelength to use to observe a solar prominence or flare is

Accepted Answer

A)  550 nm,green visible light. 
B)  656 nm,a red hydrogen emission line. 
C)  16 mm,an ultraviolet emission line. 
D)  21 cm,microwave emission. 
A)  550 nm,green visible light. 
B)  656 nm,a red hydrogen emission line. 
C)  16 mm,an ultraviolet emission line. 
D)  21 cm,microwave emission.

Exam 14: A Run-Of-The-Mill G-Type Starour Sun

Nuclei of atoms are held together by gravity.

By studying how the surface of the Sun vibrates like a struck bell we can determine its

Balance of energy in the solar interior means that

Which of the following layers of the Sun makes up the majority of its interior?

Light from the photosphere reaches Earth approximately __________ times faster than photons released in fusion in the core.

Explain why hydrostatic equilibrium results in the center of the Sun having the highest pressure and temperature.

The solar spectrum is an example of a(n)__________ spectrum.

The solar neutrino problem was solved by

The Sun's internal magnetic field becomes tangled up over time because of

When solar activity is very high,the Earth's atmosphere will

If a coronal mass ejection occurs on the Sun that expels material at a speed of 800 km/s,how long will it take these charged particles to reach the Earth?

Which of the following are manifestations of solar magnetic activity?

The Sun's magnetic field reverses direction every

In the proton-proton chain,the net reaction is that 4 protons are converted into 1 helium nucleus.What other by-products are released in this reaction,and why?

If the Sun stopped nuclear fusion in its core,it would take 100 years for its luminosity to change.

The opacity within the Sun is due primarily to the absorption and scattering of electromagnetic radiation by electrons in the Sun.

Which of the following methods is not used to transport energy from the core to the surface of the Sun?

When two atomic nuclei come together to form a new species of atom,it is called

In the proton-proton chain,the net reaction is that 4 hydrogen nuclei are converted to 1 helium nucleus and __________ are released.

The best wavelength to use to observe a solar prominence or flare is

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

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