Our Star: The Sun

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Questions Bank

Our Place in the Universe
Patterns in the Skymotions of Earth
Laws of Motion
Light and Telescopes
The Formation of Stars and Planets
Terrestrial Worlds in the Inner Solar System
Atmospheres of Venus, Earth, and Mars
The Giant Planets
Small Bodies of the Solar System
Measuring the Stars
Our Star: The Sun
Evolution of Low-Mass Stars
Evolution of High-Mass Stars
The Expansion of Space
The Realm of the Galaxies
Our Galaxy: The Milky Way
Modern Cosmology and the Origin of Structure
Life in the Universe

All Questions

Question 1

Free

True/False

In our Sun,hydrostatic equilibrium exists only in the core,where energy production via fusion can balance gravity.

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True

False

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Question 2

Free

True/False

At the center of the Sun,the temperature is roughly 15 million K.

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True

False

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Question 3

Free

True/False

In the proton-proton chain,the net result is that 4 protons are converted into 1 helium nucleus and energy,electrons,and neutrinos are released.

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True

False

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Question 4

Free

True/False

Nuclei of atoms are held together by gravity.

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True

False

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Question 5

Free

True/False

In the radiative zone inside the Sun,photons are transported from the core to the convective zone in a matter of seconds.

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True

False

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Question 6

True/False

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

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True

False

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Question 7

True/False

Opacity in the interior of the Sun allows efficient release of energy to surrounding layers.

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True

False

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Question 8

True/False

Neutrinos are particles with small masses that interact easily with normal matter.

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True

False

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Question 9

True/False

The fact that the surface of the Sun rings like a bell lets us understand its interior better.

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True

False

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Question 10

True/False

The solar neutrino problem was solved by postulating that neutrinos have a small mass and oscillate between five different types of neutrino.

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True

False

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Question 11

True/False

The temperature of the corona is much hotter than any other layer in the solar atmosphere.

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True

False

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Question 12

True/False

The solar magnetic field switches polarity every 11 years.

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True

False

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Question 13

True/False

If coronal holes covered a larger fraction of the Sun's surface,the solar wind would contain a higher density of particles.

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True

False

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Question 14

True/False

Sunspots generally occur in pairs with opposite polarity.

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True

False

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Question 15

Multiple Choice

Our Sun is unique compared to the other stars in our galaxy because of its:

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temperature

size

evolutionary stage

proximity

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Question 16

Multiple Choice

The Sun has a mass of:

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2 × 10³⁰ kg

2 × 10¹⁰ kg

2 × 10²⁰ kg

2 × 10⁴⁰ kg

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Question 17

Multiple Choice

The majority of the Sun's energy comes from:

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gravitational contraction

its rapid rotation

hydrogen fusion

helium burning

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Question 18

Multiple Choice

The energy that fuels the Sun is generated:

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only on its surface

only in its core

both in its core and on its surface

in its core,on the surface,and in the solar wind

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Question 19

Multiple Choice

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

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nuclear fission

nuclear fusion

nuclear splitting

nuclear recombination

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Question 20

Multiple Choice

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

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visible wavelength photons

gamma ray photons,positrons,and neutrinos

ultraviolet photons and neutrinos

X-ray photons,electrons,and neutrinos

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