Question 1

On average, the Milky Way forms about stars per year.

Accepted Answer

The answer of On average, the Milky Way forms about...

Question 2

Define "technological civilization" according to Drake.

Accepted Answer

Drake defined a technological

Question 3

The transition from single to multicellular life took over two billion years.

Accepted Answer

A) True 
 B)False

Question 4

In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?

Accepted Answer

A)  a star a day 
B)  a star a month 
C)  a star a year 
D)  a star a decade 
E)  a star a century 
A)  a star a day 
B)  a star a month 
C)  a star a year 
D)  a star a decade 
E)  a star a century

Question 5

As an artificial radio source, the spinning Earth would have a period of about a day.

Accepted Answer

A) True 
 B)False

Question 6

Why does SETI concentrate on the water hole?

Accepted Answer

The interval between

Question 7

Outside our Earth, the most likely places for life are the planet and jovian moon
.

Accepted Answer

Mars; Euro

Question 8

The Allen Telescope Array is one of the many radio searches for extraterrestrial life.

Accepted Answer

A) True 
 B)False

Question 9

The Murchison meteorite contained

Accepted Answer

A)  12 amino acids. 
B)  bacteria. 
C)  living cells. 
D)  RNA. 
E)  DNA. 
A)  12 amino acids. 
B)  bacteria. 
C)  living cells. 
D)  RNA. 
E)  DNA.

Question 10

Which of the following appears least important in the evolution of life here?

Accepted Answer

A)  the correct distance from the Sun 
B)  an Earth- like atmosphere 
C)  the stable luminosity of the Sun for billions of years 
D)  the magnetic field of the Earth 
E)  the presence of water and carbon atoms 
A)  the correct distance from the Sun 
B)  an Earth- like atmosphere 
C)  the stable luminosity of the Sun for billions of years 
D)  the magnetic field of the Earth 
E)  the presence of water and carbon atoms

Question 11

Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations currently in existence?

Accepted Answer

A)  the number of supernova explosions 
B)  the average survival time of the civilizations 
C)  the expansion of the universe 
D)  the speed of technological development 
E)  the lack of metals for technology 
A)  the number of supernova explosions 
B)  the average survival time of the civilizations 
C)  the expansion of the universe 
D)  the speed of technological development 
E)  the lack of metals for technology

Question 12

Describe the reasoning leading to the idea that the number of technological civilizations in the galaxy is equal to the average lifetime of a technological civilization.

Accepted Answer

We know the rate of star formation, abou

Question 13

Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?

Accepted Answer

A)  amino acids 
B)  lipids 
C)  vitamins 
D)  sugars 
E)  DNA 
A)  amino acids 
B)  lipids 
C)  vitamins 
D)  sugars 
E)  DNA

Question 14

Why is life difficult to define?

Accepted Answer

Life must be able to react, grow, reprod

Question 15

The range of wavelengths for the "water hole" is cm.

Accepted Answer

The answer of The range of wavelengths for the "water...

Question 16

Cultural evolution has primarily taken place over the last years.

Accepted Answer

A)  10 
B)  100 
C)  1,000 
D)  2,000 
E)  10,000 
A)  10 
B)  100 
C)  1,000 
D)  2,000 
E)  10,000

Question 17

Interest in life on Mars has died since the latest surveys have found no signs of liquid water on its surface now.

Accepted Answer

A) True 
 B)False

Question 18

What evidence did probes to Mars find that makes it a prime candidate for life?

Accepted Answer

Water ice at the poles, photog

Question 19

As a radio source, the period of "pulsar Earth" is

Accepted Answer

A)  30 minutes. 
B)  23 hours, 56 minutes. 
C)  24 hours. 
D)  29.5 days. 
E)  365.25 days. 
A)  30 minutes. 
B)  23 hours, 56 minutes. 
C)  24 hours. 
D)  29.5 days. 
E)  365.25 days.

Question 20

Which class of stars probably has too small a habitable zone for life to arise?

Accepted Answer

Class M stars are to

On average, the Milky Way forms about stars per year.

Define "technological civilization" according to Drake.

The transition from single to multicellular life took over two billion years.

In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?

As an artificial radio source, the spinning Earth would have a period of about a day.

Why does SETI concentrate on the water hole?

Outside our Earth, the most likely places for life are the planet and jovian moon .

The Allen Telescope Array is one of the many radio searches for extraterrestrial life.

The Murchison meteorite contained

Which of the following appears least important in the evolution of life here?

Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations currently in existence?

Describe the reasoning leading to the idea that the number of technological civilizations in the galaxy is equal to the average lifetime of a technological civilization.

Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?

Why is life difficult to define?

The range of wavelengths for the "water hole" is cm.

Cultural evolution has primarily taken place over the last years.

Interest in life on Mars has died since the latest surveys have found no signs of liquid water on its surface now.

What evidence did probes to Mars find that makes it a prime candidate for life?

As a radio source, the period of "pulsar Earth" is

Which class of stars probably has too small a habitable zone for life to arise?

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

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Exam 19: Life in the Universe: Are We Alone

On average, the Milky Way forms about stars per year.

Define "technological civilization" according to Drake.

The transition from single to multicellular life took over two billion years.

In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?

As an artificial radio source, the spinning Earth would have a period of about a day.

Why does SETI concentrate on the water hole?

Outside our Earth, the most likely places for life are the planet and jovian moon .

The Allen Telescope Array is one of the many radio searches for extraterrestrial life.

The Murchison meteorite contained

Which of the following appears least important in the evolution of life here?

Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations currently in existence?

Describe the reasoning leading to the idea that the number of technological civilizations in the galaxy is equal to the average lifetime of a technological civilization.

Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?

Why is life difficult to define?

The range of wavelengths for the "water hole" is cm.

Cultural evolution has primarily taken place over the last years.

Interest in life on Mars has died since the latest surveys have found no signs of liquid water on its surface now.

What evidence did probes to Mars find that makes it a prime candidate for life?

As a radio source, the period of "pulsar Earth" is

Which class of stars probably has too small a habitable zone for life to arise?

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Filters