Question 1

A planet found orbiting a star other than the sun is called a(n) ____________________.

Accepted Answer

The answer of A planet found orbiting a star other...

Question 2

The age of the solar system is believed to be approximately 4.6 billion years based on the data from

Accepted Answer

A)  samples of lunar rocks. 
B)  samples of Earth rocks. 
C)  samples of meteorites. 
D)  all of the above. 
E)  none of the above. 
A)  samples of lunar rocks. 
B)  samples of Earth rocks. 
C)  samples of meteorites. 
D)  all of the above. 
E)  none of the above.

Question 3

The pressure of sunlight was one of the forces that cleared the solar nebula.

Accepted Answer

A) True 
 B)False

Question 4

Observations in the infrared have detected dusty nebulae around the star, Beta Pictoris.

Accepted Answer

A) True 
 B)False

Question 5

If the terrestrial planets were formed by homogeneous accretion, then

Accepted Answer

A)  they were initially molten forming an iron core first, then they accreted a silicate crust later. 
B)  they were initially molten forming a silicate core first, then they accreted an iron crust later. 
C)  they were initially collections of solid particles which melted then differentiated into a high-density iron metal core and low-density silicate crust. 
D)  they were initially collections of solid particles which melted then differentiated into a high-density silicate core and low-density iron metal crust. 
A)  they were initially molten forming an iron core first, then they accreted a silicate crust later. 
B)  they were initially molten forming a silicate core first, then they accreted an iron crust later. 
C)  they were initially collections of solid particles which melted then differentiated into a high-density iron metal core and low-density silicate crust. 
D)  they were initially collections of solid particles which melted then differentiated into a high-density silicate core and low-density iron metal crust.

Question 6

The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because

Accepted Answer

A)  the solar nebula from which the planets formed had a disk-like structure. 
B)  the bipolar flow from the young sun cleared all material out of the nebula except that in the disk. 
C)  Jupiter's gravity was great enough to pull all of the other planets to the plane of its orbit. 
D)  the Milky Way Galaxy from which the planets condensed has a disk-like structure 
A)  the solar nebula from which the planets formed had a disk-like structure. 
B)  the bipolar flow from the young sun cleared all material out of the nebula except that in the disk. 
C)  Jupiter's gravity was great enough to pull all of the other planets to the plane of its orbit. 
D)  the Milky Way Galaxy from which the planets condensed has a disk-like structure

Question 7

The hydrogen in our solar system was created from subatomic particles in

Accepted Answer

A)  the Earth. 
B)  our sun. 
C)  Jupiter. 
D)  the Big Bang. 
E)  supernovae. 
A)  the Earth. 
B)  our sun. 
C)  Jupiter. 
D)  the Big Bang. 
E)  supernovae.

Question 8

A planet is much more massive than the star it orbits.

Accepted Answer

A) True 
 B)False

Question 9

Which planetary fact(s) is(are) explained by the solar nebula theory?

Accepted Answer

A)  The orbits are all approximately in the same plane 
B)  The orbits are all in the same direction 
C)  Jovian planets are mostly H and He 
D)  Terrestrial planets are mostly rock and iron 
E)  All of the above 
A)  The orbits are all approximately in the same plane 
B)  The orbits are all in the same direction 
C)  Jovian planets are mostly H and He 
D)  Terrestrial planets are mostly rock and iron 
E)  All of the above

Question 10

The condensation sequence cannot explain the composition of the terrestrial and Jovian planets.

Accepted Answer

A) True 
 B)False

Question 11

Accretion among the grains in the solar nebula would have been aided by

Accepted Answer

A)  static electricity. 
B)  gravity. 
C)  high-velocity collisions. 
D)  all of the above. 
E)  none of the above. 
A)  static electricity. 
B)  gravity. 
C)  high-velocity collisions. 
D)  all of the above. 
E)  none of the above.

Question 12

The ____________________ of a radioactive substance is the amount of time for the substance to be reduced by half.

Accepted Answer

The answer of The ____________________ of a radioactive substance is...

Question 13

Describe some characteristics that the terrestrial planets have in common. Use the solar nebula theory to explain the commonality.

Accepted Answer

The answer of Describe some characteristics that the terrestrial planets...

Question 14

The iron in our solar system was created from smaller-mass atomic nuclei in

Accepted Answer

A)  the Earth. 
B)  our sun. 
C)  Jupiter. 
D)  the Big Bang. 
E)  supernovae. 
A)  the Earth. 
B)  our sun. 
C)  Jupiter. 
D)  the Big Bang. 
E)  supernovae.

Question 15

A planet is much brighter than the star it orbits.

Accepted Answer

A) True 
 B)False

Question 16

Suppose that Mercury grew to its present size in 1 million years through the accretion of particles averaging 100 g each. On average how many particles did Mercury capture each second? Note: Mercury has a mass of 3.3*1023 kg and a radius of 2439 km.

Accepted Answer

A)  about 24 particles per second 
B)  about 3.3*1021 particles per second 
C)  about 67 particles per second 
D)  about 100 million particles per second 
E)  about 100 billion particles per second 
A)  about 24 particles per second 
B)  about 3.3*1021 particles per second 
C)  about 67 particles per second 
D)  about 100 million particles per second 
E)  about 100 billion particles per second

Question 17

The adding of material an atom at a time to create a solid grain or flake is the process of ____________________.

Accepted Answer

The answer of The adding of material an atom at...

Question 18

How does the solar nebula theory explain the present densities and chemical compositions of the planets?

Accepted Answer

The answer of How does the solar nebula theory explain...

Question 19

The Jovian planets have lower average densities than the terrestrial planets.

Accepted Answer

A) True 
 B)False

Question 20

The solar nebula theory is NOT able to explain which of the following observed characteristics of the solar system?

Accepted Answer

A)  common direction of rotation of the planets 
B)  common direction of revolution of the planets 
C)  the formation of hydrogen atoms in the solar system from subatomic particles 
D)  the density of the Jovian planets 
A)  common direction of rotation of the planets 
B)  common direction of revolution of the planets 
C)  the formation of hydrogen atoms in the solar system from subatomic particles 
D)  the density of the Jovian planets

A planet found orbiting a star other than the sun is called a(n) ____________________.

The age of the solar system is believed to be approximately 4.6 billion years based on the data from

The pressure of sunlight was one of the forces that cleared the solar nebula.

Observations in the infrared have detected dusty nebulae around the star, Beta Pictoris.

If the terrestrial planets were formed by homogeneous accretion, then

The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because

The hydrogen in our solar system was created from subatomic particles in

A planet is much more massive than the star it orbits.

Which planetary fact(s) is(are) explained by the solar nebula theory?

The condensation sequence cannot explain the composition of the terrestrial and Jovian planets.

Accretion among the grains in the solar nebula would have been aided by

The ____________________ of a radioactive substance is the amount of time for the substance to be reduced by half.

Describe some characteristics that the terrestrial planets have in common. Use the solar nebula theory to explain the commonality.

The iron in our solar system was created from smaller-mass atomic nuclei in

A planet is much brighter than the star it orbits.

Suppose that Mercury grew to its present size in 1 million years through the accretion of particles averaging 100 g each. On average how many particles did Mercury capture each second? Note: Mercury has a mass of 3.3*10²³ kg and a radius of 2439 km.

The adding of material an atom at a time to create a solid grain or flake is the process of ____________________.

How does the solar nebula theory explain the present densities and chemical compositions of the planets?

The Jovian planets have lower average densities than the terrestrial planets.

The solar nebula theory is NOT able to explain which of the following observed characteristics of the solar system?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 15: The Origin of the Solar System

A planet found orbiting a star other than the sun is called a(n) ____________________.

The age of the solar system is believed to be approximately 4.6 billion years based on the data from

The pressure of sunlight was one of the forces that cleared the solar nebula.

Observations in the infrared have detected dusty nebulae around the star, Beta Pictoris.

If the terrestrial planets were formed by homogeneous accretion, then

The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because

The hydrogen in our solar system was created from subatomic particles in

A planet is much more massive than the star it orbits.

Which planetary fact(s) is(are) explained by the solar nebula theory?

The condensation sequence cannot explain the composition of the terrestrial and Jovian planets.

Accretion among the grains in the solar nebula would have been aided by

The ____________________ of a radioactive substance is the amount of time for the substance to be reduced by half.

Describe some characteristics that the terrestrial planets have in common. Use the solar nebula theory to explain the commonality.

The iron in our solar system was created from smaller-mass atomic nuclei in

A planet is much brighter than the star it orbits.

Suppose that Mercury grew to its present size in 1 million years through the accretion of particles averaging 100 g each. On average how many particles did Mercury capture each second? Note: Mercury has a mass of 3.3*1023 kg and a radius of 2439 km.

The adding of material an atom at a time to create a solid grain or flake is the process of ____________________.

How does the solar nebula theory explain the present densities and chemical compositions of the planets?

The Jovian planets have lower average densities than the terrestrial planets.

The solar nebula theory is NOT able to explain which of the following observed characteristics of the solar system?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Suppose that Mercury grew to its present size in 1 million years through the accretion of particles averaging 100 g each. On average how many particles did Mercury capture each second? Note: Mercury has a mass of 3.3*10²³ kg and a radius of 2439 km.