Question 1

The force of gravity between two objects is proportional to the

Accepted Answer

A)  difference of their masses. 
B)  product of their masses. 
C)  ratio of their masses. 
D)  sum of their masses. 
A)  difference of their masses. 
B)  product of their masses. 
C)  ratio of their masses. 
D)  sum of their masses.

Question 2

The semimajor axis of an ellipse is

Accepted Answer

A)  the distance from one focus to any point on the circumference of the ellipse. 
B)  the distance from the center to one side of the ellipse along the shortest diameter of the ellipse. 
C)  the distance from the center of the ellipse to one end along the largest distance across of the ellipse. 
D)  half the distance between the foci of the ellipse. 
A)  the distance from one focus to any point on the circumference of the ellipse. 
B)  the distance from the center to one side of the ellipse along the shortest diameter of the ellipse. 
C)  the distance from the center of the ellipse to one end along the largest distance across of the ellipse. 
D)  half the distance between the foci of the ellipse.

Question 3

The average distance between Earth and the Sun is called a "light-year."

Accepted Answer

A) True 
 B)False

Question 4

As viewed from Earth,the farthest a planet can be observed from the rising Sun is called the greatest eastern elongation.

Accepted Answer

A) True 
 B)False

Question 5

How will the illuminated side of Venus appear to us when it is at its greatest eastern elongation?

Accepted Answer

A)  A full circle 
B)  Half-illuminated,or quarter-phase 
C)  Gibbous 
D)  Crescent shaped 
A)  A full circle 
B)  Half-illuminated,or quarter-phase 
C)  Gibbous 
D)  Crescent shaped

Question 6

How fast does Earth rotate in the geocentric model of the solar system?

Accepted Answer

A)  Earth does not rotate in the geocentric model. 
B)  One rotation in 24 hours 
C)  One rotation in 29 days 
D)  One rotation in 365.24 days 
A)  Earth does not rotate in the geocentric model. 
B)  One rotation in 24 hours 
C)  One rotation in 29 days 
D)  One rotation in 365.24 days

Question 7

Suppose that a planet of 10 times the mass of Earth were orbiting the Sun at the same distance as Earth (1 AU).The gravitational force on this planet due to the Sun would be

Accepted Answer

A)  100 times that on Earth due to the Sun. 
B)  1/10 of that on Earth due to the Sun. 
C)  1/100 of that on Earth due to the Sun. 
D)  10 times that on Earth due to the Sun. 
A)  100 times that on Earth due to the Sun. 
B)  1/10 of that on Earth due to the Sun. 
C)  1/100 of that on Earth due to the Sun. 
D)  10 times that on Earth due to the Sun.

Question 8

Galileo's observations suggested to him that the planets revolve around the Sun.This idea was

Accepted Answer

A)  original with Galileo and had not been suggested before. 
B)  similar to the teachings of the Roman Catholic Church. 
C)  similar to the ideas of Ptolemy. 
D)  similar to the ideas of Copernicus. 
A)  original with Galileo and had not been suggested before. 
B)  similar to the teachings of the Roman Catholic Church. 
C)  similar to the ideas of Ptolemy. 
D)  similar to the ideas of Copernicus.

Question 9

An astronomical unit (AU)is the distance between Earth and the Moon.

Accepted Answer

A) True 
 B)False

Question 10

Eratosthenes' value of Earth's circumference is remarkably close to the modern value.

Accepted Answer

A) True 
 B)False

Question 11

When Mercury is at its farthest distance from Earth,it is at

Accepted Answer

A)  greatest elongation. 
B)  inferior conjunction. 
C)  superior conjunction. 
D)  opposition. 
A)  greatest elongation. 
B)  inferior conjunction. 
C)  superior conjunction. 
D)  opposition.

Question 12

According to Kepler's second law,a planet moves the fastest when it is at what position?

Accepted Answer

A)  Aphelion 
B)  Perihelion 
C)  Neither perihelion nor aphelion. 
D)  A planet moves at the same speed regardless of its position in an elliptical orbit. 
A)  Aphelion 
B)  Perihelion 
C)  Neither perihelion nor aphelion. 
D)  A planet moves at the same speed regardless of its position in an elliptical orbit.

Question 13

If you weighed 180 pounds on Earth,how much would you weigh on the Moon,which has about 1/6 Earth's gravity on the surface.

Accepted Answer

A)  0 pounds 
B)  30 pounds 
C)  150 pounds 
D)  180 pounds 
A)  0 pounds 
B)  30 pounds 
C)  150 pounds 
D)  180 pounds

Question 14

What did Galileo see when he observed Venus through his telescope?

Accepted Answer

A)  Nothing interesting,because Venus is perpetually cloud-covered 
B)  Four satellites (moons)orbiting Venus 
C)  A set of rings 
D)  Phases like those of the Moon 
A)  Nothing interesting,because Venus is perpetually cloud-covered 
B)  Four satellites (moons)orbiting Venus 
C)  A set of rings 
D)  Phases like those of the Moon

Question 15

How fast will an airplane be traveling after 4 seconds if it accelerates from rest down a runway at a rate of 10 meters/sec2?

Accepted Answer

A)  4 m/s 
B)  10 m/s 
C)  40 m/s 
D)  160 m/s 
A)  4 m/s 
B)  10 m/s 
C)  40 m/s 
D)  160 m/s

Question 16

How strong is the gravitational force of attraction between two objects that drift four times closer?

Accepted Answer

A)  Four times weaker 
B)  Two times greater 
C)  Four times greater 
D)  Sixteen times greater 
A)  Four times weaker 
B)  Two times greater 
C)  Four times greater 
D)  Sixteen times greater

Question 17

Why do orbiting satellites sometimes fall out of orbit and crash back to Earth?

Accepted Answer

Orbiting satellites do sometimes fall ou

Question 18

A certain object in space is accelerating.From this,we know for certain that

Accepted Answer

A)  its speed is changing. 
B)  both its speed and its direction of travel are changing. 
C)  its speed or its direction of travel is changing,but not both. 
D)  its speed,its direction of travel,or both are changing. 
A)  its speed is changing. 
B)  both its speed and its direction of travel are changing. 
C)  its speed or its direction of travel is changing,but not both. 
D)  its speed,its direction of travel,or both are changing.

Question 19

Nicolaus Copernicus was the first person to

Accepted Answer

A)  develop a mathematical model for a Sun-centered solar system. 
B)  use a telescope to observe the sky at night. 
C)  use ellipses to describe the orbits of the planets. 
D)  describe planetary orbits using the force of gravity. 
A)  develop a mathematical model for a Sun-centered solar system. 
B)  use a telescope to observe the sky at night. 
C)  use ellipses to describe the orbits of the planets. 
D)  describe planetary orbits using the force of gravity.

Question 20

Which of the following statements is TRUE,according to Kepler's third law?

Accepted Answer

A)  The smaller the orbit,the longer it takes for the planet to complete one revolution. 
B)  The smaller the radius of a planet,the more rapidly it rotates on its axis. 
C)  The larger the orbit,the longer it takes for the planet to complete one revolution. 
D)  The time to complete one revolution of its orbit depends on the size or radius of the planet. 
A)  The smaller the orbit,the longer it takes for the planet to complete one revolution. 
B)  The smaller the radius of a planet,the more rapidly it rotates on its axis. 
C)  The larger the orbit,the longer it takes for the planet to complete one revolution. 
D)  The time to complete one revolution of its orbit depends on the size or radius of the planet.

The force of gravity between two objects is proportional to the

The semimajor axis of an ellipse is

The average distance between Earth and the Sun is called a "light-year."

As viewed from Earth,the farthest a planet can be observed from the rising Sun is called the greatest eastern elongation.

How will the illuminated side of Venus appear to us when it is at its greatest eastern elongation?

How fast does Earth rotate in the geocentric model of the solar system?

Suppose that a planet of 10 times the mass of Earth were orbiting the Sun at the same distance as Earth (1 AU).The gravitational force on this planet due to the Sun would be

Galileo's observations suggested to him that the planets revolve around the Sun.This idea was

An astronomical unit (AU)is the distance between Earth and the Moon.

Eratosthenes' value of Earth's circumference is remarkably close to the modern value.

When Mercury is at its farthest distance from Earth,it is at

According to Kepler's second law,a planet moves the fastest when it is at what position?

If you weighed 180 pounds on Earth,how much would you weigh on the Moon,which has about 1/6 Earth's gravity on the surface.

What did Galileo see when he observed Venus through his telescope?

How fast will an airplane be traveling after 4 seconds if it accelerates from rest down a runway at a rate of 10 meters/sec²?

How strong is the gravitational force of attraction between two objects that drift four times closer?

Why do orbiting satellites sometimes fall out of orbit and crash back to Earth?

A certain object in space is accelerating.From this,we know for certain that

Nicolaus Copernicus was the first person to

Which of the following statements is TRUE,according to Kepler's third law?

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters

Exam 3: Analyzing Scales and Motions of the Universe

The force of gravity between two objects is proportional to the

The semimajor axis of an ellipse is

The average distance between Earth and the Sun is called a "light-year."

As viewed from Earth,the farthest a planet can be observed from the rising Sun is called the greatest eastern elongation.

How will the illuminated side of Venus appear to us when it is at its greatest eastern elongation?

How fast does Earth rotate in the geocentric model of the solar system?

Suppose that a planet of 10 times the mass of Earth were orbiting the Sun at the same distance as Earth (1 AU).The gravitational force on this planet due to the Sun would be

Galileo's observations suggested to him that the planets revolve around the Sun.This idea was

An astronomical unit (AU)is the distance between Earth and the Moon.

Eratosthenes' value of Earth's circumference is remarkably close to the modern value.

When Mercury is at its farthest distance from Earth,it is at

According to Kepler's second law,a planet moves the fastest when it is at what position?

If you weighed 180 pounds on Earth,how much would you weigh on the Moon,which has about 1/6 Earth's gravity on the surface.

What did Galileo see when he observed Venus through his telescope?

How fast will an airplane be traveling after 4 seconds if it accelerates from rest down a runway at a rate of 10 meters/sec2?

How strong is the gravitational force of attraction between two objects that drift four times closer?

Why do orbiting satellites sometimes fall out of orbit and crash back to Earth?

A certain object in space is accelerating.From this,we know for certain that

Nicolaus Copernicus was the first person to

Which of the following statements is TRUE,according to Kepler's third law?

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters

How fast will an airplane be traveling after 4 seconds if it accelerates from rest down a runway at a rate of 10 meters/sec²?