Question 1

In what circumstances is retrograde motion observable?

Accepted Answer

A) It is observable for planets located between the Earth and the Sun. 
B) It is observable for planets more distant from the Sun than the Earth 
C) It is only observable for the Moon. 
D) It is observable for all planets. 
A) It is observable for planets located between the Earth and the Sun. 
B) It is observable for planets more distant from the Sun than the Earth 
C) It is only observable for the Moon. 
D) It is observable for all planets.

Question 2

What was the basis for Isaac Newton's conclusion that a force from the Earth must be acting on the Moon?

Accepted Answer

A) A force is needed to keep the Moon in motion in its orbit. 
B) A force is needed to pull the Moon outward. 
C) A force is needed to accelerate the Moon toward the Earth, away from straight-line motion. 
D) The Moon moved at a constant velocity in a straight line. 
A) A force is needed to keep the Moon in motion in its orbit. 
B) A force is needed to pull the Moon outward. 
C) A force is needed to accelerate the Moon toward the Earth, away from straight-line motion. 
D) The Moon moved at a constant velocity in a straight line.

Question 3

Gravity obeys an inverse square relation.What does this statement imply about the force due to gravity between two masses?

Accepted Answer

A) It will increase as the distance between the two masses increases. 
B) It will decrease as the square of the distance between the two masses increases. 
C) It will cause the two masses to move in a straight line. 
D) It will cause the two masses to orbit each other. 
A) It will increase as the distance between the two masses increases. 
B) It will decrease as the square of the distance between the two masses increases. 
C) It will cause the two masses to move in a straight line. 
D) It will cause the two masses to orbit each other.

Question 4

What two numbers tell us the size and shape of an ellipse?

Accepted Answer

A) radius, eccentricity 
B) radius, deferent 
C) semi-major axis, deferent 
D) semi-major axis, eccentricity 
A) radius, eccentricity 
B) radius, deferent 
C) semi-major axis, deferent 
D) semi-major axis, eccentricity

Question 5

Why does Ptolemy include epicycles in his model?

Accepted Answer

The answer of Why does Ptolemy include epicycles in his...

Question 6

If Copernicus overthrew the geocentric universe,what did Kepler overthrow?

Accepted Answer

The answer of If Copernicus overthrew the geocentric universe,what did...

Question 7

The force due to gravity has the mathematical form:
$ F=-\frac{G M m}{r^{2}} $

Accepted Answer

A) True 
 B)False

Question 8

Galileo's telescopic discoveries of mountains on the Moon and spots on the Sun were controversial because they suggested something about the Sun and Moon.What was it?

Accepted Answer

A) that they were the same kind of object 
B) that they were not perfect spheres 
C) that they were inhabited 
D) that they orbited each other 
A) that they were the same kind of object 
B) that they were not perfect spheres 
C) that they were inhabited 
D) that they orbited each other

Question 9

The period of Jupiter's orbit around the Sun is approximately 12 years.What is the approximate distance from the Sun to Jupiter?

Accepted Answer

A) 5.2 AU 
B) 42 AU 
C) 144 AU 
D) 1728 AU 
A) 5.2 AU 
B) 42 AU 
C) 144 AU 
D) 1728 AU

Question 10

What are Kepler's three laws of planetary motion?

Accepted Answer

Kepler's three laws of planetary motion

Question 11

Which of the following statements reflects beliefs that were almost universally held in pre-Copernican astronomy?

Accepted Answer

A) The planets travelled in elliptical orbits around the Earth. 
B) The planets travelled in elliptical orbits around the Sun. 
C) The Sun was at the centre of the universe. 
D) The Earth was at the centre of the universe. 
A) The planets travelled in elliptical orbits around the Earth. 
B) The planets travelled in elliptical orbits around the Sun. 
C) The Sun was at the centre of the universe. 
D) The Earth was at the centre of the universe.

Question 12

-Which of the following statements is implied by Kepler's second law of planetary motion?

Accepted Answer

A) A planet should move at its greatest speed when it is closest to the Sun. 
B) The most massive planets will have the greatest speed in their orbits. 
C) The speed of a planet in its orbit depends on the size of the epicycle. 
D) The mass of the planet determines how far the planet is from the Sun. 
A) A planet should move at its greatest speed when it is closest to the Sun. 
B) The most massive planets will have the greatest speed in their orbits. 
C) The speed of a planet in its orbit depends on the size of the epicycle. 
D) The mass of the planet determines how far the planet is from the Sun.

Question 13

If the mass of the Earth decreased by a factor of 2,with no change in the radius,what would happen to your weight?

Accepted Answer

A) It would increase by a factor of 4. 
B) It would increase by a factor of 2. 
C) It would decrease by a factor of 2. 
D) It would decrease by a factor of 4. 
A) It would increase by a factor of 4. 
B) It would increase by a factor of 2. 
C) It would decrease by a factor of 2. 
D) It would decrease by a factor of 4.

Question 14

Ocean tides of low amplitude that occur at first and third quarter Moons are called ____________________.

Accepted Answer

The answer of Ocean tides of low amplitude that occur...

Question 15

The orbit of the planet Jupiter is an ellipse with the Sun at one focus.What is located at the other focus?

Accepted Answer

A) the Earth 
B) the asteroid belt 
C) Saturn 
D) nothing 
A) the Earth 
B) the asteroid belt 
C) Saturn 
D) nothing

Question 16

When we say that gravitation is universal,what do we mean?

Accepted Answer

A) The Earth exerts gravitational force on objects on its surface. 
B) The Earth exerts a gravitational force on its Moon and vice versa. 
C) The Earth, the Moon, and the Sun exert gravitational force on each other. 
D) All objects exert gravitational force on one another. 
A) The Earth exerts gravitational force on objects on its surface. 
B) The Earth exerts a gravitational force on its Moon and vice versa. 
C) The Earth, the Moon, and the Sun exert gravitational force on each other. 
D) All objects exert gravitational force on one another.

Question 17

According to Kepler's third law,a planet's orbital period ____________________ is equal to its average distance from the Sun ____________________.

Accepted Answer

The answer of According to Kepler's third law,a planet's orbital...

Question 18

What feature of Ptolemy's model of the universe allowed it to explain retrograde motion?

Accepted Answer

A) heliocentrism 
B) elliptical orbits 
C) epicycles 
D) geocentrism 
A) heliocentrism 
B) elliptical orbits 
C) epicycles 
D) geocentrism

Question 19

Describe one observation that would disprove the Ptolemaic model and explain why it would conflict with the model.

Accepted Answer

The answer of Describe one observation that would disprove the...

Question 20

Given its orbital period of 76 years,what is the average distance of Comet Halley from the Sun?

Accepted Answer

A) 18 AU 
B) 38 AU 
C) 51 AU 
D) 114 AU 
A) 18 AU 
B) 38 AU 
C) 51 AU 
D) 114 AU

In what circumstances is retrograde motion observable?

What was the basis for Isaac Newton's conclusion that a force from the Earth must be acting on the Moon?

Gravity obeys an inverse square relation.What does this statement imply about the force due to gravity between two masses?

What two numbers tell us the size and shape of an ellipse?

Why does Ptolemy include epicycles in his model?

If Copernicus overthrew the geocentric universe,what did Kepler overthrow?

The force due to gravity has the mathematical form: $F=-\frac{G M m}{r^{2}}$

Galileo's telescopic discoveries of mountains on the Moon and spots on the Sun were controversial because they suggested something about the Sun and Moon.What was it?

The period of Jupiter's orbit around the Sun is approximately 12 years.What is the approximate distance from the Sun to Jupiter?

What are Kepler's three laws of planetary motion?

Which of the following statements reflects beliefs that were almost universally held in pre-Copernican astronomy?

-Which of the following statements is implied by Kepler's second law of planetary motion?

If the mass of the Earth decreased by a factor of 2,with no change in the radius,what would happen to your weight?

Ocean tides of low amplitude that occur at first and third quarter Moons are called ____________________.

The orbit of the planet Jupiter is an ellipse with the Sun at one focus.What is located at the other focus?

When we say that gravitation is universal,what do we mean?

According to Kepler's third law,a planet's orbital period is equal to its average distance from the Sun .

What feature of Ptolemy's model of the universe allowed it to explain retrograde motion?

Describe one observation that would disprove the Ptolemaic model and explain why it would conflict with the model.

Given its orbital period of 76 years,what is the average distance of Comet Halley from the Sun?

The Scale of the Cosmos

User's Guide to the Sky

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

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The Structure and Formation of Stars

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Cosmology in the 21st Century

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Exam 3: The Origin of Modern Astronomy

In what circumstances is retrograde motion observable?

What was the basis for Isaac Newton's conclusion that a force from the Earth must be acting on the Moon?

Gravity obeys an inverse square relation.What does this statement imply about the force due to gravity between two masses?

What two numbers tell us the size and shape of an ellipse?

Why does Ptolemy include epicycles in his model?

If Copernicus overthrew the geocentric universe,what did Kepler overthrow?

The force due to gravity has the mathematical form: F=−GMmr2 F=-\frac{G M m}{r^{2}} F=−r2GMm​

Galileo's telescopic discoveries of mountains on the Moon and spots on the Sun were controversial because they suggested something about the Sun and Moon.What was it?

The period of Jupiter's orbit around the Sun is approximately 12 years.What is the approximate distance from the Sun to Jupiter?

What are Kepler's three laws of planetary motion?

Which of the following statements reflects beliefs that were almost universally held in pre-Copernican astronomy?

-Which of the following statements is implied by Kepler's second law of planetary motion?

If the mass of the Earth decreased by a factor of 2,with no change in the radius,what would happen to your weight?

Ocean tides of low amplitude that occur at first and third quarter Moons are called ____________________.

The orbit of the planet Jupiter is an ellipse with the Sun at one focus.What is located at the other focus?

When we say that gravitation is universal,what do we mean?

According to Kepler's third law,a planet's orbital period ____________________ is equal to its average distance from the Sun ____________________.

What feature of Ptolemy's model of the universe allowed it to explain retrograde motion?

Describe one observation that would disprove the Ptolemaic model and explain why it would conflict with the model.

Given its orbital period of 76 years,what is the average distance of Comet Halley from the Sun?

The Scale of the Cosmos

User's Guide to the Sky

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters

The force due to gravity has the mathematical form: $F=-\frac{G M m}{r^{2}}$

According to Kepler's third law,a planet's orbital period is equal to its average distance from the Sun .