Question 1

In the above photo, where is the Sun located?

Accepted Answer

A)  not shown but above the cactus 
B)  not shown but to the right of the cactus 
C)  not shown but below the cactus 
D)  not shown but to the left of the cactus 
A)  not shown but above the cactus 
B)  not shown but to the right of the cactus 
C)  not shown but below the cactus 
D)  not shown but to the left of the cactus

Question 2

The ____________ planets have larger radii than the ____________ planets.

Accepted Answer

The answer of The ____________ planets have larger radii than...

Question 3

After 3 half-lives, what percent of the original radioactive atoms are still in the sample as shown in the graph above?

Accepted Answer

A)  12.5 
B)  25 
C)  50 
D)  100 
A)  12.5 
B)  25 
C)  50 
D)  100

Question 4

Comets are rocky bodies that orbit the Sun beyond the orbit of Neptune.

Accepted Answer

A) True 
 B)False

Question 5

If a star is found with five planets orbiting it, and a process like that described in the solar nebula theory formed the planets, which of the planets would be expected to have the greatest uncompressed density?

Accepted Answer

A)  The one farthest from the star. 
B)  The one with the greatest mass. 
C)  The one with the greatest radius. 
D)  The one closest to the star. 
E)  The one that has liquid water on its surface. 
A)  The one farthest from the star. 
B)  The one with the greatest mass. 
C)  The one with the greatest radius. 
D)  The one closest to the star. 
E)  The one that has liquid water on its surface.

Question 6

The original cloud from which the Sun and planets formed had a composition rich in hydrogen and helium.

Accepted Answer

A) True 
 B)False

Question 7

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 8

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 9

A future news release might report that a new planet has been found around a star very similar to our Sun. The system contains other planets as well like our solar system. This newly discovered planet is claimed to have a mass 40 times that of Earth and is located nearly 25 AU from the star it orbits. Which of the following would be a reasonable prediction about this planet, assuming it formed like our solar system?
I. the planet will probably have a mean density of around 5 g/cm3.
II. The planet will probably have a radius of around five to ten times greater than Earth's.
III. The planet will probably have several satellites.
IV. The planet will probably have a composition that is mostly hydrogen and helium.

Accepted Answer

A)  I & IV 
B)  I, II, & III 
C)  II, III, & IV 
D)  I, II, & IV 
E)  I, II, III, & IV 
A)  I & IV 
B)  I, II, & III 
C)  II, III, & IV 
D)  I, II, & IV 
E)  I, II, III, & IV

Question 10

One common technique used to discover the presence of an extrasolar planet around a star is to detect how they tug their stars about, creating small Doppler shifts in the stars' spectra.

Accepted Answer

A) True 
 B)False

Question 11

Which are the oldest solar system objects that have been dated radioactively? What are their ages?

Accepted Answer

​ 
The most important source for determi

Question 12

Cold dust disks are _____________ disks around main-sequence stars, the dust of which is created by collisions among the planetesimals.

Accepted Answer

The answer of Cold dust disks are _____________ disks around...

Question 13

A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface.

Accepted Answer

A)  asteroid 
B)  meteor 
C)  comet 
D)  meteoroid 
E)  planetesimal 
A)  asteroid 
B)  meteor 
C)  comet 
D)  meteoroid 
E)  planetesimal

Question 14

____________ pushed gas and dust particles out of the solar nebula by the light from the Sun.

Accepted Answer

A)  Radiation pressure 
B)  Outgassing 
C)  Condensation 
D)  Accretion 
E)  Differentiation 
A)  Radiation pressure 
B)  Outgassing 
C)  Condensation 
D)  Accretion 
E)  Differentiation

Question 15

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 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 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 18

Using the above photo only, the solar wind is moving parallel to the comet.

Accepted Answer

A) True 
 B)False

Question 19

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 20

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

Accepted Answer

A) True 
 B)False

In the above photo, where is the Sun located?

The planets have larger radii than the planets.

After 3 half-lives, what percent of the original radioactive atoms are still in the sample as shown in the graph above?

Comets are rocky bodies that orbit the Sun beyond the orbit of Neptune.

If a star is found with five planets orbiting it, and a process like that described in the solar nebula theory formed the planets, which of the planets would be expected to have the greatest uncompressed density?

The original cloud from which the Sun and planets formed had a composition rich in hydrogen and helium.

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 a characteristic of Jovian planets?

One common technique used to discover the presence of an extrasolar planet around a star is to detect how they tug their stars about, creating small Doppler shifts in the stars' spectra.

Which are the oldest solar system objects that have been dated radioactively? What are their ages?

Cold dust disks are _____________ disks around main-sequence stars, the dust of which is created by collisions among the planetesimals.

A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface.

____________ pushed gas and dust particles out of the solar nebula by the light from the Sun.

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

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

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

Using the above photo only, the solar wind is moving parallel to the comet.

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

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

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: Origin of the Solar System and Extrasolar Planets

In the above photo, where is the Sun located?

The ____________ planets have larger radii than the ____________ planets.

After 3 half-lives, what percent of the original radioactive atoms are still in the sample as shown in the graph above?

Comets are rocky bodies that orbit the Sun beyond the orbit of Neptune.

If a star is found with five planets orbiting it, and a process like that described in the solar nebula theory formed the planets, which of the planets would be expected to have the greatest uncompressed density?

The original cloud from which the Sun and planets formed had a composition rich in hydrogen and helium.

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 a characteristic of Jovian planets?

One common technique used to discover the presence of an extrasolar planet around a star is to detect how they tug their stars about, creating small Doppler shifts in the stars' spectra.

Which are the oldest solar system objects that have been dated radioactively? What are their ages?

Cold dust disks are _____________ disks around main-sequence stars, the dust of which is created by collisions among the planetesimals.

A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface.

____________ pushed gas and dust particles out of the solar nebula by the light from the Sun.

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

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

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

Using the above photo only, the solar wind is moving parallel to the comet.

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

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

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

The planets have larger radii than the planets.