Question 1

A newly formed planet or large asteroid becomes molten due to

Accepted Answer

A) the last infalling objects. 
B) decay of radioactive element isotopes. 
C) the last infalling objects and decay of radioactive element isotopes. 
D) none of the other choices as newly formed planets remain solid inside. 
A) the last infalling objects. 
B) decay of radioactive element isotopes. 
C) the last infalling objects and decay of radioactive element isotopes. 
D) none of the other choices as newly formed planets remain solid inside.

Question 2

51 Pegasi is important because

Accepted Answer

A) it is a pulsar with planets orbiting around it. 
B) it is a star with a planet that is known to support intelligent life. 
C) it is the largest satellite of Jupiter. 
D) it is the largest known asteroid. 
E) it is the first star like our Sun that was found to have a planet orbiting it. 
A) it is a pulsar with planets orbiting around it. 
B) it is a star with a planet that is known to support intelligent life. 
C) it is the largest satellite of Jupiter. 
D) it is the largest known asteroid. 
E) it is the first star like our Sun that was found to have a planet orbiting it.

Question 3

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 4

Compared to the terrestrial planets, Jovian planets

Accepted Answer

A) have a higher density. 
B) have a smaller number of moons. 
C) have a much larger diameters. 
D) are much hotter. 
A) have a higher density. 
B) have a smaller number of moons. 
C) have a much larger diameters. 
D) are much hotter.

Question 5

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 other choices are correct. 
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 other choices are correct.

Question 6

The ___________ hypothesis of the formation of the solar system uses sudden events that drastically alter the form of the early solar system.

Accepted Answer

The answer of The ___________ hypothesis of the formation of...

Question 7

Describe some characteristics that all the planets seem to share and use the solar nebula theory to explain them.

Accepted Answer

All planets orbit in nearly the same pla

Question 8

Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of ____________density and a rocky mantle or crust of ____________ density.

Accepted Answer

A) higher; lower 
B) lower; higher 
C) Wrong! The interior stays solid. 
D) Wrong! There is no separation according to density. 
A) higher; lower 
B) lower; higher 
C) Wrong! The interior stays solid. 
D) Wrong! There is no separation according to density.

Question 9

The object shown is a/an _____________ of less than 240 pounds.

Accepted Answer

A) meteor 
B) comet 
C) meteorite 
D) satellite 
A) meteor 
B) comet 
C) meteorite 
D) satellite

Question 10

Which one of the following IS a characteristic of Jovian planets

Accepted Answer

A) low average density 
B) orbits inside the asteroids 
C) craters in old surfaces 
D) small diameters 
E) very few satellites 
A) low average density 
B) orbits inside the asteroids 
C) craters in old surfaces 
D) small diameters 
E) very few satellites

Question 11

The first small solid grains or flakes formed in our solar system by the process of ____________, the addition of material to an object an atom or molecule at a time.

Accepted Answer

A) accretion 
B) sublimation 
C) hydration 
D) condensation 
E) vaporization 
A) accretion 
B) sublimation 
C) hydration 
D) condensation 
E) vaporization

Question 12

Which one of the following IS NOT a characteristic of terrestrial planets

Accepted Answer

A) low average density 
B) orbits inside the asteroids 
C) craters in old surfaces 
D) small diameters 
E) very few satellites 
A) low average density 
B) orbits inside the asteroids 
C) craters in old surfaces 
D) small diameters 
E) very few satellites

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

How do the motions of the Sun and planets reflect the disk shape of the solar nebula

Accepted Answer

The solar nebula theory supposes that pl

Question 15

Protoplanets

Accepted Answer

A) grew in size primarily by accretion. 
B) grew in size primarily by condensation. 
C) are still visible today as the terrestrial planets. 
D) grew in size by collecting the particles in the solar wind. 
E) grew in size by the collision and coalescing of planetesimals. 
A) grew in size primarily by accretion. 
B) grew in size primarily by condensation. 
C) are still visible today as the terrestrial planets. 
D) grew in size by collecting the particles in the solar wind. 
E) grew in size by the collision and coalescing of planetesimals.

Question 16

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 17

The solar system contains no extrasolar planets.

Accepted Answer

A) True 
 B)False

Question 18

________________ hypotheses involve a rare event in the origin of the solar system.

Accepted Answer

The answer of ________________ hypotheses involve a rare event in...

Question 19

Condensation in the solar nebula probably led to the formation of

Accepted Answer

A) icy grains beyond the present orbit of Jupiter. 
B) metallic grains near the present orbit of Mercury. 
C) silicate grains near the present orbit of Earth. 
D) icy grains beyond the present orbit of Jupiter, metallic grains near the present orbit of Mercury, and silicate grains near the present orbit of Earth. 
E) None of the other choices are correct. 
A) icy grains beyond the present orbit of Jupiter. 
B) metallic grains near the present orbit of Mercury. 
C) silicate grains near the present orbit of Earth. 
D) icy grains beyond the present orbit of Jupiter, metallic grains near the present orbit of Mercury, and silicate grains near the present orbit of Earth. 
E) None of the other choices are correct.

Question 20

How is radioactive dating used to determine the age of an object

Accepted Answer

A) Both the amounts of radioactive and decay material are measured. Using these with the radioactive material's half-life, the age can be estimated. 
B) The amount of radioactive material is measured. Using this with the radioactive material's half-life, the age can be estimated. 
C) The amount of decay material is measured. Using this with the radioactive material's half-life, the age can be estimated. 
D) The amount of heat generated by radioactive dating is measured to determine age. 
A) Both the amounts of radioactive and decay material are measured. Using these with the radioactive material's half-life, the age can be estimated. 
B) The amount of radioactive material is measured. Using this with the radioactive material's half-life, the age can be estimated. 
C) The amount of decay material is measured. Using this with the radioactive material's half-life, the age can be estimated. 
D) The amount of heat generated by radioactive dating is measured to determine age.

A newly formed planet or large asteroid becomes molten due to

51 Pegasi is important because

If the terrestrial planets were formed by homogeneous accretion, then

Compared to the terrestrial planets, Jovian planets

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

The ___________ hypothesis of the formation of the solar system uses sudden events that drastically alter the form of the early solar system.

Describe some characteristics that all the planets seem to share and use the solar nebula theory to explain them.

Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of density and a rocky mantle or crust of density.

The object shown is a/an _____________ of less than 240 pounds.

Which one of the following IS a characteristic of Jovian planets

The first small solid grains or flakes formed in our solar system by the process of ____________, the addition of material to an object an atom or molecule at a time.

Which one of the following IS NOT a characteristic of terrestrial planets

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

How do the motions of the Sun and planets reflect the disk shape of the solar nebula

Protoplanets

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

The solar system contains no extrasolar planets.

________________ hypotheses involve a rare event in the origin of the solar system.

Condensation in the solar nebula probably led to the formation of

How is radioactive dating used to determine the age of an object

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 newly formed planet or large asteroid becomes molten due to

51 Pegasi is important because

If the terrestrial planets were formed by homogeneous accretion, then

Compared to the terrestrial planets, Jovian planets

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

The ___________ hypothesis of the formation of the solar system uses sudden events that drastically alter the form of the early solar system.

Describe some characteristics that all the planets seem to share and use the solar nebula theory to explain them.

Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of ____________density and a rocky mantle or crust of ____________ density.

The object shown is a/an _____________ of less than 240 pounds.

Which one of the following IS a characteristic of Jovian planets

The first small solid grains or flakes formed in our solar system by the process of ____________, the addition of material to an object an atom or molecule at a time.

Which one of the following IS NOT a characteristic of terrestrial planets

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

How do the motions of the Sun and planets reflect the disk shape of the solar nebula

Protoplanets

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

The solar system contains no extrasolar planets.

________________ hypotheses involve a rare event in the origin of the solar system.

Condensation in the solar nebula probably led to the formation of

How is radioactive dating used to determine the age of an object

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

Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of density and a rocky mantle or crust of density.