Question 1

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

Accepted Answer

A) True 
 B)False  True

Question 2

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. D

Question 3

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 E

Question 4

All planets rotate in the counterclockwise direction as seen from the north.

Accepted Answer

A) True 
 B)False

Question 5

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

Question 6

Half-life is the time a celestial body has left in its evolution.

Accepted Answer

A) True 
 B)False

Question 7

The condensation sequence suggests that ____________ should condense as solids closest to the Sun.

Accepted Answer

A)  hydrogen and helium 
B)  metals and metal oxides 
C)  silicates 
D)  ices of water, methane, and ammonia 
A)  hydrogen and helium 
B)  metals and metal oxides 
C)  silicates 
D)  ices of water, methane, and ammonia

Question 8

How is the presence of space debris accounted for by solar system models?

Accepted Answer

A)  Space debris is left over material from the early solar system that never formed into a planet. 
B)  Space debris was formed by the collision of objects after the planets formed. 
C)  Space debris is material that existed in our region of space before the Sun formed. 
D)  Space debris is left over material from the early solar system that never formed into a planet and was formed by the collision of objects after the planets formed. 
E)  All of the other choices are correct. 
A)  Space debris is left over material from the early solar system that never formed into a planet. 
B)  Space debris was formed by the collision of objects after the planets formed. 
C)  Space debris is material that existed in our region of space before the Sun formed. 
D)  Space debris is left over material from the early solar system that never formed into a planet and was formed by the collision of objects after the planets formed. 
E)  All of the other choices are correct.

Question 9

From 20-25 days, the planet is

Accepted Answer

A)  moving towards, then away from, then towards, then away from you 
B)  moving away from, then towards, then away from, then towards you 
C)  moving towards, then away from, then towards you 
D)  moving away from, then towards, then away from you 
A)  moving towards, then away from, then towards, then away from you 
B)  moving away from, then towards, then away from, then towards you 
C)  moving towards, then away from, then towards you 
D)  moving away from, then towards, then away from you

Question 10

The Jovian problem refers to

Accepted Answer

A)  the high speed with which the Jovian planets rotate on their axes. 
B)  the large number of satellites that orbit each Jovian planet. 
C)  the existence of rings around the Jovian planets. 
D)  the excess heat radiated by the larger of the Jovian planets. 
E)  the apparently short period of time that disks exist around stars from which Jovian planets can form. 
A)  the high speed with which the Jovian planets rotate on their axes. 
B)  the large number of satellites that orbit each Jovian planet. 
C)  the existence of rings around the Jovian planets. 
D)  the excess heat radiated by the larger of the Jovian planets. 
E)  the apparently short period of time that disks exist around stars from which Jovian planets can form.

Question 11

Why are more massive planets circling stars easier to detect than low-mass planets?

Accepted Answer

As the planet circles the star, the star

Question 12

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 13

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)  samples of lunar rocks, Earth rocks, and meteorites. 
E)  None of the other choices are correct. 
A)  samples of lunar rocks. 
B)  samples of Earth rocks. 
C)  samples of meteorites. 
D)  samples of lunar rocks, Earth rocks, and meteorites. 
E)  None of the other choices are correct.

Question 14

Outside the ice line the temperatures are too warm for ices to condense.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

When particles in the solar nebula grew large enough, they stopped growing by accretion and began growing by condensation.

Accepted Answer

A) True 
 B)False

Question 17

The present motions of the planets were inherited from the rotation of the solar nebula.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

According to the solar nebula theory, th

Question 19

____________ are icy bodies left over from the formation of the solar system and are an example of a planetesimal.

Accepted Answer

The answer of ____________ are icy bodies left over from...

Question 20

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

Accepted Answer

​ 
The outer four planets, Jupiter, Satu

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

Condensation in the solar nebula probably led to the formation of

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.

All planets rotate in the counterclockwise direction as seen from the north.

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

Half-life is the time a celestial body has left in its evolution.

The condensation sequence suggests that ____________ should condense as solids closest to the Sun.

How is the presence of space debris accounted for by solar system models?

From 20-25 days, the planet is

The Jovian problem refers to

Why are more massive planets circling stars easier to detect than low-mass planets?

Protoplanets

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

Outside the ice line the temperatures are too warm for ices to condense.

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

When particles in the solar nebula grew large enough, they stopped growing by accretion and began growing by condensation.

The present motions of the planets were inherited from the rotation of the solar nebula.

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

____________ are icy bodies left over from the formation of the solar system and are an example of a planetesimal.

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

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

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

Condensation in the solar nebula probably led to the formation of

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.

All planets rotate in the counterclockwise direction as seen from the north.

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

Half-life is the time a celestial body has left in its evolution.

The condensation sequence suggests that ____________ should condense as solids closest to the Sun.

How is the presence of space debris accounted for by solar system models?

From 20-25 days, the planet is

The Jovian problem refers to

Why are more massive planets circling stars easier to detect than low-mass planets?

Protoplanets

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

Outside the ice line the temperatures are too warm for ices to condense.

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

When particles in the solar nebula grew large enough, they stopped growing by accretion and began growing by condensation.

The present motions of the planets were inherited from the rotation of the solar nebula.

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

____________ are icy bodies left over from the formation of the solar system and are an example of a planetesimal.

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

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.