Question 1

Why do our best radar maps of Venus come from the Magellan space probe?

Accepted Answer

Magellan went into orbit aroun

Question 2

What are coronae?

Accepted Answer

large, circular volc

Question 3

Compared to Earth, Venus has:

Accepted Answer

A) a more transparent atmosphere. 
B) a lower average surface temperature. 
C) a far greater percentage of its surface in low-level ocean basins. 
D) about the same percentage of its surface in raised continents. 
E) a far greater percentage of its surface in raised continents. 
A) a more transparent atmosphere. 
B) a lower average surface temperature. 
C) a far greater percentage of its surface in low-level ocean basins. 
D) about the same percentage of its surface in raised continents. 
E) a far greater percentage of its surface in raised continents.

Question 4

If Venus's clouds block much of the sunlight before it reaches the surface, why is the planet sohot?

Accepted Answer

The carbon dioxide in the dense atmosphe

Question 5

Why were the Russian Venera spacecraft so important to our understanding of Venus?

Accepted Answer

They were the first spacecraft

Question 6

Our most detailed maps of Venus come from:

Accepted Answer

A) the Magellan space probe. 
B) the Hubble Space Telescope. 
C) direct observation from Earth-based optical telescopes. 
D) manned landings. 
E) Earth-based radio telescopes. 
A) the Magellan space probe. 
B) the Hubble Space Telescope. 
C) direct observation from Earth-based optical telescopes. 
D) manned landings. 
E) Earth-based radio telescopes.

Question 7

The reason that the atmosphere of Venus is over 95% carbon dioxide is thought to bebecause:

Accepted Answer

A) Venus was much hotter than Earth when its atmosphere formed. 
B) the early plant life on Venus produced the excess carbon dioxide and consumed the oxygen. 
C) life on Earth formed earlier than on Venus. 
D) the part of the solar nebula where Venus formed contained more carbon dioxide than the partwhere Earth formed. 
E) Venus's greenhouse effect got out of control and became runaway after its oceans of sulfuricacid evaporated. 
A) Venus was much hotter than Earth when its atmosphere formed. 
B) the early plant life on Venus produced the excess carbon dioxide and consumed the oxygen. 
C) life on Earth formed earlier than on Venus. 
D) the part of the solar nebula where Venus formed contained more carbon dioxide than the partwhere Earth formed. 
E) Venus's greenhouse effect got out of control and became runaway after its oceans of sulfuricacid evaporated.

Question 8

Venus can appear as a crescent through the telescope.

Accepted Answer

A) True 
 B)False

Question 9

Venus's rotation period is longer than its year.

Accepted Answer

A) True 
 B)False

Question 10

Every time the Earth and Venus are closest, the same side of Venus is facing us.

Accepted Answer

A) True 
 B)False

Question 11

Because of its slow rotation period, Venus:

Accepted Answer

A) appears to go through phases like the Moon. 
B) gets closer to Earth than any other planet. 
C) presents the same side to the Sun all the time. 
D) presents the same side to Earth all the time. 
E) presents the same side to Earth at each closest approach. 
A) appears to go through phases like the Moon. 
B) gets closer to Earth than any other planet. 
C) presents the same side to the Sun all the time. 
D) presents the same side to Earth all the time. 
E) presents the same side to Earth at each closest approach.

Question 12

If Venus once had an ocean, where did it go?

Accepted Answer

A) It exists as abundant water vapor in the planet's atmosphere. 
B) It was lost to space, stripped away by the solar wind. 
C) The water broke into hydrogen, which escaped to space, and oxygen, which became trappedin the planet's surface rocks. 
D) It exists trapped in the crust but below the surface. 
E) It is found in the cooler polar regions, like at the Moon and Mercury. 
A) It exists as abundant water vapor in the planet's atmosphere. 
B) It was lost to space, stripped away by the solar wind. 
C) The water broke into hydrogen, which escaped to space, and oxygen, which became trappedin the planet's surface rocks. 
D) It exists trapped in the crust but below the surface. 
E) It is found in the cooler polar regions, like at the Moon and Mercury.

Question 13

The atmosphere of Venus is about 95% ________.

Accepted Answer

The answer of The atmosphere of Venus is about 95%...

Question 14

Venus's high surface temperature is due to the ________ effect.

Accepted Answer

The answer of Venus's high surface temperature is due to...

Question 15

The rilles found in Ovda Regio are evidence of:

Accepted Answer

A) ancient river beds. 
B) plate tectonics. 
C) something akin to sea-floor spreading. 
D) ancient oceans. 
E) lava flows. 
A) ancient river beds. 
B) plate tectonics. 
C) something akin to sea-floor spreading. 
D) ancient oceans. 
E) lava flows.

Question 16

The relatively small number of impact craters and the near absence of small craters on thesurface of Venus are thought to be a result of:

Accepted Answer

A) the soft and resilient nature of the Venusian surface. 
B) the thick Venusian atmosphere. 
C) the position of Venus in the solar system-not many meteoroids cross Venus's orbit. 
D) Venus's lack of a satellite. 
E) the ancient oceans that once existed on Venus. 
A) the soft and resilient nature of the Venusian surface. 
B) the thick Venusian atmosphere. 
C) the position of Venus in the solar system-not many meteoroids cross Venus's orbit. 
D) Venus's lack of a satellite. 
E) the ancient oceans that once existed on Venus.

Question 17

Venus has a highly eccentric orbit, accounting for its large temperature extremes.

Accepted Answer

A) True 
 B)False

Question 18

What is the primary effect that the carbon dioxide in Venus's atmosphere has on the planet?

Accepted Answer

The high concentration of carb

Question 19

Compared to Earth, Venus spins very rapidly.

Accepted Answer

A) True 
 B)False

Question 20

Our best data about the surface topography of Venus has come from:

Accepted Answer

A) Magellan radar data and radar observations of the planet from Earth. 
B) spacecraft flybys like Mariner 2 and visual observations of the planet. 
C) radio and visual observations. 
D) orbiter photos from Pioneer Venus Orbiter. 
E) the three flybys of Mariner 10. 
A) Magellan radar data and radar observations of the planet from Earth. 
B) spacecraft flybys like Mariner 2 and visual observations of the planet. 
C) radio and visual observations. 
D) orbiter photos from Pioneer Venus Orbiter. 
E) the three flybys of Mariner 10.

Exam 9: Venus: Earths Sister Planet

Why do our best radar maps of Venus come from the Magellan space probe?

What are coronae?

Compared to Earth, Venus has:

If Venus's clouds block much of the sunlight before it reaches the surface, why is the planet sohot?

Why were the Russian Venera spacecraft so important to our understanding of Venus?

Our most detailed maps of Venus come from:

The reason that the atmosphere of Venus is over 95% carbon dioxide is thought to bebecause:

Venus can appear as a crescent through the telescope.

Venus's rotation period is longer than its year.

Every time the Earth and Venus are closest, the same side of Venus is facing us.

Because of its slow rotation period, Venus:

If Venus once had an ocean, where did it go?

The atmosphere of Venus is about 95% ________.

Venus's high surface temperature is due to the ________ effect.

The rilles found in Ovda Regio are evidence of:

The relatively small number of impact craters and the near absence of small craters on thesurface of Venus are thought to be a result of:

Venus has a highly eccentric orbit, accounting for its large temperature extremes.

What is the primary effect that the carbon dioxide in Venus's atmosphere has on the planet?

Compared to Earth, Venus spins very rapidly.

Our best data about the surface topography of Venus has come from:

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information From the Cosmos

Spectroscopy: the Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Mars: a Near Miss for Life

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Gas and Dust Among the Stars

Star Formation: a Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae, Supernovae, and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone

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