Question 1

The numbers of sunspots and their activity peak about every

Accepted Answer

A)  36 days. 
B)  six months. 
C)  year. 
D)  eleven years. 
E)  76 years. 
A)  36 days. 
B)  six months. 
C)  year. 
D)  eleven years. 
E)  76 years.

Question 2

The percentage (by number of atoms) of the Sun that is hydrogen is about

Accepted Answer

A)  91%. 
B)  71%. 
C)  27%. 
D)  9%. 
E)  less than 1%. 
A)  91%. 
B)  71%. 
C)  27%. 
D)  9%. 
E)  less than 1%.

Question 3

What do sunspots tell us about the Sun's rotation rate?

Accepted Answer

Watching and timing sunspots as they tra

Question 4

Solar activity cannot disrupt communications on Earth.

Accepted Answer

A) True 
 B)False

Question 5

The light we see from the Sun comes from which layer?

Accepted Answer

A)  Troposphere 
B)  Chromosphere 
C)  Photosphere 
D)  Ionosphere 
E)  Corona 
A)  Troposphere 
B)  Chromosphere 
C)  Photosphere 
D)  Ionosphere 
E)  Corona

Question 6

Energy produced in the solar core is transferred by ________ until it reaches a point about 500,000 km from the center.

Accepted Answer

The answer of Energy produced in the solar core is...

Question 7

Why couldn't you stand on the Sun's surface?

Accepted Answer

A)  The Sun has no surface at all...the photosphere is an illusion. 
B)  You could stand on the surface. 
C)  The Sun doesn't have a solid surface. 
D)  The Sun's surface is too highly magnetized for anything to survive there. 
E)  You could stand on it, if a sufficiently protective spacesuit could be designed. 
A)  The Sun has no surface at all...the photosphere is an illusion. 
B)  You could stand on the surface. 
C)  The Sun doesn't have a solid surface. 
D)  The Sun's surface is too highly magnetized for anything to survive there. 
E)  You could stand on it, if a sufficiently protective spacesuit could be designed.

Question 8

A solar flare creates a radio disturbance on Earth a few minutes after going off and again several days later. Explain.

Accepted Answer

A flare will give off intense X-rays and

Question 9

Describe the method of energy production in the Sun. What is the fuel? What is the end product? What kind of interactions occur? What is the role of temperature in the process? Could we use this process to produce energy on Earth?

Accepted Answer

The Sun produces energy by fusing hydrog

Question 10

-The above diagram indicates that

Accepted Answer

A)  the Sun is most dense somewhere between its surface and its core. 
B)  the Sun is least dense somewhere between its surface and its core. 
C)  the Sun is more dense at its surface than at its core. 
D)  the Sun is more dense at its core than at its surface. 
E)  the Sun has about the same density throughout its interior. 
A)  the Sun is most dense somewhere between its surface and its core. 
B)  the Sun is least dense somewhere between its surface and its core. 
C)  the Sun is more dense at its surface than at its core. 
D)  the Sun is more dense at its core than at its surface. 
E)  the Sun has about the same density throughout its interior.

Question 11

The solar corona produces a lot more X-rays than it does visible light.

Accepted Answer

A) True 
 B)False

Question 12

What natural barrier tries to prevent two protons from combining?

Accepted Answer

A)  Dark energy 
B)  Antigravity 
C)  Electromagnetic repulsion 
D)  The weak nuclear force 
E)  The strong nuclear force 
A)  Dark energy 
B)  Antigravity 
C)  Electromagnetic repulsion 
D)  The weak nuclear force 
E)  The strong nuclear force

Question 13

How does solar luminosity vary during the sunspot cycle?

Accepted Answer

The Sun is slightly

Question 14

Loops of glowing hydrogen seen hanging over the solar limb during totality are

Accepted Answer

A)  solar rainbows. 
B)  haloes. 
C)  prominences. 
D)  filaments. 
E)  flares. 
A)  solar rainbows. 
B)  haloes. 
C)  prominences. 
D)  filaments. 
E)  flares.

Question 15

The critical temperature the core must reach for a star to shine by fusion is

Accepted Answer

A)  5,800 K. 
B)  11,000 K. 
C)  127,000 K. 
D)  10 million K. 
E)  100 million K. 
A)  5,800 K. 
B)  11,000 K. 
C)  127,000 K. 
D)  10 million K. 
E)  100 million K.

Question 16

Which of the following is NOT a property of neutrinos?

Accepted Answer

A)  Can change forms in the eight minutes from the Sun's core to us 
B)  Almost massless 
C)  Can travel very close to the speed of light 
D)  Neutral in charge 
E)  Cannot interact at all with normal matter 
A)  Can change forms in the eight minutes from the Sun's core to us 
B)  Almost massless 
C)  Can travel very close to the speed of light 
D)  Neutral in charge 
E)  Cannot interact at all with normal matter

Question 17

The area in the Sun's atmosphere located above the chromosphere (1,500 - 10,000 km) where the temperature rises dramatically is called the

Accepted Answer

A)  photosphere. 
B)  corona. 
C)  solar wind. 
D)  transition zone. 
E)  convection zone. 
A)  photosphere. 
B)  corona. 
C)  solar wind. 
D)  transition zone. 
E)  convection zone.

Question 18

The sunspot cycle is sometimes described as lasting 11 years, but others prefer to consider it as 22 years; explain the rationale.

Accepted Answer

The numbers of sunspots come to a peak a

Question 19

The solar corona is much cooler than the Sun's surface; hence we must wait for a total solar eclipse to glimpse it with the naked eye.

Accepted Answer

A) True 
 B)False

Question 20

What gives the most direct view into the Sun's core?

Accepted Answer

Neutrinos travel directly out

The numbers of sunspots and their activity peak about every

The percentage (by number of atoms) of the Sun that is hydrogen is about

What do sunspots tell us about the Sun's rotation rate?

Solar activity cannot disrupt communications on Earth.

The light we see from the Sun comes from which layer?

Energy produced in the solar core is transferred by ________ until it reaches a point about 500,000 km from the center.

Why couldn't you stand on the Sun's surface?

A solar flare creates a radio disturbance on Earth a few minutes after going off and again several days later. Explain.

Describe the method of energy production in the Sun. What is the fuel? What is the end product? What kind of interactions occur? What is the role of temperature in the process? Could we use this process to produce energy on Earth?

-The above diagram indicates that

The solar corona produces a lot more X-rays than it does visible light.

What natural barrier tries to prevent two protons from combining?

How does solar luminosity vary during the sunspot cycle?

Loops of glowing hydrogen seen hanging over the solar limb during totality are

The critical temperature the core must reach for a star to shine by fusion is

Which of the following is NOT a property of neutrinos?

The area in the Sun's atmosphere located above the chromosphere (1,500 - 10,000 km) where the temperature rises dramatically is called the

The sunspot cycle is sometimes described as lasting 11 years, but others prefer to consider it as 22 years; explain the rationale.

The solar corona is much cooler than the Sun's surface; hence we must wait for a total solar eclipse to glimpse it with the naked eye.

What gives the most direct view into the Sun's core?

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

The Milky Way Galaxy

Galaxies

Cosmology and the Universe

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Exam 8: The Sun

The numbers of sunspots and their activity peak about every

The percentage (by number of atoms) of the Sun that is hydrogen is about

What do sunspots tell us about the Sun's rotation rate?

Solar activity cannot disrupt communications on Earth.

The light we see from the Sun comes from which layer?

Energy produced in the solar core is transferred by ________ until it reaches a point about 500,000 km from the center.

Why couldn't you stand on the Sun's surface?

A solar flare creates a radio disturbance on Earth a few minutes after going off and again several days later. Explain.

Describe the method of energy production in the Sun. What is the fuel? What is the end product? What kind of interactions occur? What is the role of temperature in the process? Could we use this process to produce energy on Earth?

-The above diagram indicates that

The solar corona produces a lot more X-rays than it does visible light.

What natural barrier tries to prevent two protons from combining?

How does solar luminosity vary during the sunspot cycle?

Loops of glowing hydrogen seen hanging over the solar limb during totality are

The critical temperature the core must reach for a star to shine by fusion is

Which of the following is NOT a property of neutrinos?

The area in the Sun's atmosphere located above the chromosphere (1,500 - 10,000 km) where the temperature rises dramatically is called the

The sunspot cycle is sometimes described as lasting 11 years, but others prefer to consider it as 22 years; explain the rationale.

The solar corona is much cooler than the Sun's surface; hence we must wait for a total solar eclipse to glimpse it with the naked eye.

What gives the most direct view into the Sun's core?

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

The Milky Way Galaxy

Galaxies

Cosmology and the Universe

Filters