Question 1

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 
E) block out sunlight 
A) expand 
B) contract 
C) remain approximately the same 
D) repel charged particles 
E) block out sunlight

Question 2

If the Sun stopped nuclear fusion in its core,it would take 1,000 years for its luminosity to change.

Accepted Answer

A) True 
 B)False

Question 3

The darkest part of a sunspot is called the:

Accepted Answer

A) penumbra 
B) umbra 
C) granule 
D) photosphere 
E) magnetic field 
A) penumbra 
B) umbra 
C) granule 
D) photosphere 
E) magnetic field

Question 4

Which of the following are created by solar magnetic activity?

Accepted Answer

A) sunspots 
B) prominences 
C) coronal mass ejections 
D) solar flares 
E) all of the above 
A) sunspots 
B) prominences 
C) coronal mass ejections 
D) solar flares 
E) all of the above

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

We know the Sun's corona is very hot because:

Accepted Answer

A) we observe it emitting radiation at visible wavelengths 
B) the chromosphere and the photosphere are that hot,too 
C) we observe absorption from highly ionized atoms of iron and calcium in its spectrum 
D) the gas emits most of its radiation at radio wavelengths 
E) all of the above 
A) we observe it emitting radiation at visible wavelengths 
B) the chromosphere and the photosphere are that hot,too 
C) we observe absorption from highly ionized atoms of iron and calcium in its spectrum 
D) the gas emits most of its radiation at radio wavelengths 
E) all of the above

Question 7

Some restaurants place food under infrared heat lamps so that it stays warm after it has been cooked.This is an example of energy being transported by:

Accepted Answer

A) radiation 
B) convection 
C) conduction 
D) convection and conduction 
E) radiation and conduction 
A) radiation 
B) convection 
C) conduction 
D) convection and conduction 
E) radiation and conduction

Question 8

If you hold on to one end of a metal spoon while placing the other end in a pot of boiling water,you will burn your hand.This is an example of energy being transported by:

Accepted Answer

A) radiation 
B) convection 
C) conduction 
D) convection and radiation 
E) radiation and conduction 
A) radiation 
B) convection 
C) conduction 
D) convection and radiation 
E) radiation and conduction

Question 9

In a sunspot,the umbra is cooler than the penumbra.

Accepted Answer

A) True 
 B)False

Question 10

Explain why the solution to the solar neutrino problem is an excellent example of how observations drive the evolution of science.

Accepted Answer

The standard model of the Sun predicted

Question 11

The 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 millions 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 
E) the core of the Sun has higher pressure than the outer 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 millions 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 
E) the core of the Sun has higher pressure than the outer layers

Question 12

Nuclei of atoms are held together by gravity.

Accepted Answer

A) True 
 B)False

Question 13

If the core of the Sun were hotter than it is now,how would the Sun's energy production change?

Accepted Answer

A) It would produce less energy per second than it does now. 
B) It would produce more energy per second than it does now. 
C) Its energy production would vary more than it does now. 
D) Its energy production would be more stable than it is now. 
E) The Sun's energy production would not change. 
A) It would produce less energy per second than it does now. 
B) It would produce more energy per second than it does now. 
C) Its energy production would vary more than it does now. 
D) Its energy production would be more stable than it is now. 
E) The Sun's energy production would not change.

Question 14

List three methods of energy transport in nature and explain how the energy is being transferred in each of those methods.Which two are means by which energy is transported inside the Sun?

Accepted Answer

Radiative-via electromagnetic radiation;

Question 15

Which of the following curves best matches the shape of a graph of the density of material inside the Sun (in thousands of kg/m3)as you move further away from the center?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 16

If you observe a maximum number of sunspots right now,how long would you have to wait to see the next solar maximum?

Accepted Answer

A) 24 hours 
B) 6 months 
C) 1 year 
D) 11 years 
E) 22 years 
A) 24 hours 
B) 6 months 
C) 1 year 
D) 11 years 
E) 22 years

Question 17

The energy that fuels the Sun is generated:

Accepted Answer

A) only on its surface 
B) only in its core 
C) only in the solar wind 
D) both in its core and on its surface 
E) in its core,on the surface,and in the solar wind 
A) only on its surface 
B) only in its core 
C) only in the solar wind 
D) both in its core and on its surface 
E) in its core,on the surface,and in the solar wind

Question 18

The Sun's magnetic field reverses direction every:

Accepted Answer

A) 24 hours 
B) 27 days 
C) 12 months 
D) 11 years 
E) 22 years 
A) 24 hours 
B) 27 days 
C) 12 months 
D) 11 years 
E) 22 years

Question 19

Which of the layers of the Sun is located the furthest from the center of the Sun?

Accepted Answer

A) chromosphere 
B) photosphere 
C) radiative zone 
D) convective zone 
E) corona 
A) chromosphere 
B) photosphere 
C) radiative zone 
D) convective zone 
E) corona

Question 20

Which force is responsible for holding the protons and neutrons in the nucleus of an atom together?

Accepted Answer

A) gravity 
B) strong nuclear force 
C) electric force 
D) magnetic force 
E) Electrons push them together. 
A) gravity 
B) strong nuclear force 
C) electric force 
D) magnetic force 
E) Electrons push them together.

Exam 14: Our Starthe Sun

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

If the Sun stopped nuclear fusion in its core,it would take 1,000 years for its luminosity to change.

The darkest part of a sunspot is called the:

Which of the following are created by solar magnetic activity?

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

We know the Sun's corona is very hot because:

Some restaurants place food under infrared heat lamps so that it stays warm after it has been cooked.This is an example of energy being transported by:

If you hold on to one end of a metal spoon while placing the other end in a pot of boiling water,you will burn your hand.This is an example of energy being transported by:

In a sunspot,the umbra is cooler than the penumbra.

Explain why the solution to the solar neutrino problem is an excellent example of how observations drive the evolution of science.

The balance of energy in the solar interior means that:

Nuclei of atoms are held together by gravity.

If the core of the Sun were hotter than it is now,how would the Sun's energy production change?

List three methods of energy transport in nature and explain how the energy is being transferred in each of those methods.Which two are means by which energy is transported inside the Sun?

Which of the following curves best matches the shape of a graph of the density of material inside the Sun (in thousands of kg/m3)as you move further away from the center?

If you observe a maximum number of sunspots right now,how long would you have to wait to see the next solar maximum?

The energy that fuels the Sun is generated:

The Sun's magnetic field reverses direction every:

Which of the layers of the Sun is located the furthest from the center of the Sun?

Which force is responsible for holding the protons and neutrons in the nucleus of an atom together?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

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 Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Which of the following curves best matches the shape of a graph of the density of material inside the Sun (in thousands of kg/m³)as you move further away from the center?