Question 1

Which of these pictures depicts the situation with the lowest entropy?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E D

Question 2

In 1952,chemists Harold Urey and Stanley Miller mixed ammonia,methane,and hydrogen;in a closed container;zapped it with electrical sparks and found that:

Accepted Answer

A) they could induce cold fusion to occur 
B) they could not induce any amino acids to form 
C) single-celled microorganisms had been spontaneously created 
D) they had created many of the amino acids contained in DNA 
E) they created life in a test tube 
A) they could induce cold fusion to occur 
B) they could not induce any amino acids to form 
C) single-celled microorganisms had been spontaneously created 
D) they had created many of the amino acids contained in DNA 
E) they created life in a test tube D

Question 3

Complex microorganisms that have complex DNA enclosed in a cell nucleus are called:

Accepted Answer

A) algae 
B) bacteria 
C) fungi 
D) eukaryotes 
E) prokaryotes 
A) algae 
B) bacteria 
C) fungi 
D) eukaryotes 
E) prokaryotes D

Question 4

Where do we think life first formed on the Earth?

Accepted Answer

A) in the air 
B) in the oceans 
C) on land 
D) on meteoroids that carried microorganisms to Earth 
E) deep in the interior of Earth 
A) in the air 
B) in the oceans 
C) on land 
D) on meteoroids that carried microorganisms to Earth 
E) deep in the interior of Earth

Question 5

What is SETI,what is its main objective,and how does it plan to achieve it?

Accepted Answer

SETI is the Search for Extraterrestrial

Question 6

The habitable zone for a 1M⨀ star ranges from 0.7 to 1.4 AU from the star.

Accepted Answer

A) True 
 B)False

Question 7

Why would the 21-cm line be a good place to search for signals from intelligent life in the universe?

Accepted Answer

Other civilizations might decide to send

Question 8

Which one of the following is NOT one of the three categories of terrestrial life based on their DNA characteristics?

Accepted Answer

A) bacteria 
B) eukarya 
C) archaea 
D) fungi 
A) bacteria 
B) eukarya 
C) archaea 
D) fungi

Question 9

According to the theory of evolution,chemical reactions resulting in the mutation of a molecule are a natural and inevitable occurrence.

Accepted Answer

A) True 
 B)False

Question 10

If the entire history of the universe were scaled to fit into one day,what time of day would microorganisms first form,oxygen start becoming a significant component of the atmosphere,and humans split off from their genetic ancestors?

Accepted Answer

The Earth is 4.5 billion years old.Micro

Question 11

The field of astrobiology uses our knowledge of ___________ to study life in the universe.

Accepted Answer

A) biology 
B) chemistry 
C) physics 
D) astronomy 
E) all of the above 
A) biology 
B) chemistry 
C) physics 
D) astronomy 
E) all of the above

Question 12

We search for intelligent life in the universe most effectively by:

Accepted Answer

A) sending out spacecraft with messages on them 
B) using radio telescopes to search for radio signals 
C) monitoring ultraviolet radiation emitted by stars 
D) sending spacecraft to explore other worlds 
E) all of the above 
A) sending out spacecraft with messages on them 
B) using radio telescopes to search for radio signals 
C) monitoring ultraviolet radiation emitted by stars 
D) sending spacecraft to explore other worlds 
E) all of the above

Question 13

If the most pessimistic assumptions in the Drake equation were true,we would:

Accepted Answer

A) have to wait for millions of years to get a message back from the nearest intelligent life 
B) have to wait for approximately 40 years to get a message back from the nearest intelligent life 
C) be the only intelligent life in the universe 
D) need to concentrate on the Andromeda Galaxy when searching for intelligent life 
E) need to concentrate on the most distant galaxies to find signs of intelligent life 
A) have to wait for millions of years to get a message back from the nearest intelligent life 
B) have to wait for approximately 40 years to get a message back from the nearest intelligent life 
C) be the only intelligent life in the universe 
D) need to concentrate on the Andromeda Galaxy when searching for intelligent life 
E) need to concentrate on the most distant galaxies to find signs of intelligent life

Question 14

Imagine if you built a time machine and successfully traveled 2 billion years backward in time.What would happen?

Accepted Answer

A) You would see dinosaurs roaming Earth. 
B) You would see numerous multicellular species on Earth. 
C) You probably would be killed by the ongoing heavy bombardment of Earth. 
D) You would die due to lack of oxygen. 
E) You would be floating in space because Earth hadn't formed yet. 
A) You would see dinosaurs roaming Earth. 
B) You would see numerous multicellular species on Earth. 
C) You probably would be killed by the ongoing heavy bombardment of Earth. 
D) You would die due to lack of oxygen. 
E) You would be floating in space because Earth hadn't formed yet.

Question 15

Which of these occurred approximately 500 million years ago?

Accepted Answer

A) the extinction of the dinosaurs 
B) the Cambrian explosion 
C) The Moon was formed. 
D) the rise of mammals 
E) the birth of the first humans 
A) the extinction of the dinosaurs 
B) the Cambrian explosion 
C) The Moon was formed. 
D) the rise of mammals 
E) the birth of the first humans

Question 16

The second law of thermodynamics states that:

Accepted Answer

A) all systems must become more disordered with time 
B) all systems must become more ordered with time 
C) some systems can become more ordered if others become less ordered by the same amount or more 
D) Earth must revolve around the Sun 
E) energy must always be conserved 
A) all systems must become more disordered with time 
B) all systems must become more ordered with time 
C) some systems can become more ordered if others become less ordered by the same amount or more 
D) Earth must revolve around the Sun 
E) energy must always be conserved

Question 17

As living organisms evolved to become more complex during the history of the Earth,did this violate the second law of thermodynamics?

Accepted Answer

As a specific organism evolved

Question 18

Using life on Earth as an example,calculate the maximum likelihood that any technologically advanced civilization that arose still exists on its home planet today.

Accepted Answer

The maximum value of L is simply the lif

Question 19

If we model the history of the universe as a single day,at what time would the dinosaurs be wiped out by a large asteroid?

Accepted Answer

A) 5:20:00 P.M. 
B) 11:00:00 P.M. 
C) 11:35:00 P.M. 
D) 11:53:10 P.M. 
E) 11:59:25 P.M. 
A) 5:20:00 P.M. 
B) 11:00:00 P.M. 
C) 11:35:00 P.M. 
D) 11:53:10 P.M. 
E) 11:59:25 P.M.

Question 20

Terrestrial life utilizes 20 different acids that are composed of only four different chemical elements.

Accepted Answer

A) True 
 B)False

Exam 24: Life

Which of these pictures depicts the situation with the lowest entropy?

In 1952,chemists Harold Urey and Stanley Miller mixed ammonia,methane,and hydrogen;in a closed container;zapped it with electrical sparks and found that:

Complex microorganisms that have complex DNA enclosed in a cell nucleus are called:

Where do we think life first formed on the Earth?

What is SETI,what is its main objective,and how does it plan to achieve it?

The habitable zone for a 1M⨀ star ranges from 0.7 to 1.4 AU from the star.

Why would the 21-cm line be a good place to search for signals from intelligent life in the universe?

Which one of the following is NOT one of the three categories of terrestrial life based on their DNA characteristics?

According to the theory of evolution,chemical reactions resulting in the mutation of a molecule are a natural and inevitable occurrence.

If the entire history of the universe were scaled to fit into one day,what time of day would microorganisms first form,oxygen start becoming a significant component of the atmosphere,and humans split off from their genetic ancestors?

The field of astrobiology uses our knowledge of ___________ to study life in the universe.

We search for intelligent life in the universe most effectively by:

If the most pessimistic assumptions in the Drake equation were true,we would:

Imagine if you built a time machine and successfully traveled 2 billion years backward in time.What would happen?

Which of these occurred approximately 500 million years ago?

The second law of thermodynamics states that:

As living organisms evolved to become more complex during the history of the Earth,did this violate the second law of thermodynamics?

Using life on Earth as an example,calculate the maximum likelihood that any technologically advanced civilization that arose still exists on its home planet today.

If we model the history of the universe as a single day,at what time would the dinosaurs be wiped out by a large asteroid?

Terrestrial life utilizes 20 different acids that are composed of only four different chemical elements.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Filters

The habitable zone for a 1M_⨀ star ranges from 0.7 to 1.4 AU from the star.