Question 1

After one _______________. of 18 years 11 1/3 days, the pattern of eclipses repeats.

Accepted Answer

The answer of After one _______________. of 18 years 11...

Question 2

Match between columns
                        Premises: The region of partial shadow where sunlight is dimmed
The region of total shadow
The orbital period with respect to the stars of about 27 days
The closest point in the Moon's orbit
A completely eclipsed Moon
A complete cycle of lunar phases of 29.53 days
The illuminated portion of the Moon increases
The two points at which the Moon's orbit crosses the ecliptic
The illuminated portion of the Moon decreases
The farthest point in the Moon's orbit

Accepted Answer

The Answer of sidereal period and waxes and wanes and is...

Question 3

How many Saros cycles does it take for the same eclipse to occur at about the same location on Earth?

Accepted Answer

A)  one cycle 
B)  three cycles 
C)  18 cycles 
D)  22 cycles 
E)  54 cycles 
A)  one cycle 
B)  three cycles 
C)  18 cycles 
D)  22 cycles 
E)  54 cycles

Question 4

What produces the lunar phases?

Accepted Answer

A)  The rotation of the Moon 
B)  The revolution of the Moon 
C)  The changing direction of sunlight 
D)  Earth's tilted axis relative to the Moon 
E)  The changing direction of Earth to the Moon 
A)  The rotation of the Moon 
B)  The revolution of the Moon 
C)  The changing direction of sunlight 
D)  Earth's tilted axis relative to the Moon 
E)  The changing direction of Earth to the Moon

Question 5

If the Moon is too far from Earth during a solar eclipse, the _____ does not reach Earth's surface.

Accepted Answer

A)  umbra 
B)  ecliptic 
C)  prominence 
D)  penumbra 
E)  solar disk 
A)  umbra 
B)  ecliptic 
C)  prominence 
D)  penumbra 
E)  solar disk

Question 6

What creates a total lunar eclipse?

Accepted Answer

A)  The Sun passes completely through Earth's umbra. 
B)  The Moon passes completely through Earth's umbra. 
C)  The Moon passes through some of Earth's penumbra. 
D)  The Earth passes completely through the Moon's umbra. 
E)  The Earth passes through some of the Moon's penumbra. 
A)  The Sun passes completely through Earth's umbra. 
B)  The Moon passes completely through Earth's umbra. 
C)  The Moon passes through some of Earth's penumbra. 
D)  The Earth passes completely through the Moon's umbra. 
E)  The Earth passes through some of the Moon's penumbra.

Question 7

Why can't the Moon always pass through the center of the umbra?

Accepted Answer

A)  The Moon's rotation is slightly faster than its revolution around Earth. 
B)  The Moon's orbit is inclined by 5 degrees to the plane of Earth's orbit. 
C)  The Moon's synodic cycle changes a few minutes per cycle. 
D)  The Moon's orbit changes with the seasons. 
E)  The Moon is not in its full moon lunar phase. 
A)  The Moon's rotation is slightly faster than its revolution around Earth. 
B)  The Moon's orbit is inclined by 5 degrees to the plane of Earth's orbit. 
C)  The Moon's synodic cycle changes a few minutes per cycle. 
D)  The Moon's orbit changes with the seasons. 
E)  The Moon is not in its full moon lunar phase.

Question 8

The Moon moves slowly against the background of the constellations.

Accepted Answer

A) True 
 B)False

Question 9

Our calendar divides the year into 30-day periods in recognition of the synodic cycle of the Moon.

Accepted Answer

A) True 
 B)False

Question 10

Eclipses can occur only when, viewed from Earth, the Sun is near one of the _______________. of the Moon's orbit.

Accepted Answer

The answer of Eclipses can occur only when, viewed from...

Question 11

What happens during a penumbral lunar eclipse?

Accepted Answer

A)  Earth only partially enters the penumbra. 
B)  Earth enters the entire penumbra. 
C)  The Moon partially enters the penumbra. 
D)  The Moon only partially enters the umbra 
E)  Earth only partially enters the penumbra 
A)  Earth only partially enters the penumbra. 
B)  Earth enters the entire penumbra. 
C)  The Moon partially enters the penumbra. 
D)  The Moon only partially enters the umbra 
E)  Earth only partially enters the penumbra

Question 12

A solar eclipse can only occur when the Moon is ____

Accepted Answer

A)  full 
B)  new 
C)  waning 
D)  waxing 
E)  rising 
A)  full 
B)  new 
C)  waning 
D)  waxing 
E)  rising

Question 13

The Moon has a dark side that is never lit by the Sun.

Accepted Answer

A) True 
 B)False

Question 14

Why does the Moon appear reddish during a total lunar eclipse and not go completely dark?

Accepted Answer

During a total lunar eclipse, you would

Question 15

Eclipses can occur only when, viewed from Earth, the Sun is near one of the ____ of the Moon's orbit.

Accepted Answer

A)  nodes 
B)  points 
C)  phases 
D)  paths 
E)  ecliptics 
A)  nodes 
B)  points 
C)  phases 
D)  paths 
E)  ecliptics

Question 16

A "larger" Moon on the horizon is an optical illusion.

Accepted Answer

A) True 
 B)False

Question 17

Any location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates.

Accepted Answer

A) True 
 B)False

Question 18

What are the two parts of a shadow during an eclipse?

Accepted Answer

A)  total and partial 
B)  apogee and perigee 
C)  sidereal and synodic 
D)  waxing and waning 
E)  umbra and penumbra 
A)  total and partial 
B)  apogee and perigee 
C)  sidereal and synodic 
D)  waxing and waning 
E)  umbra and penumbra

Question 19

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Accepted Answer

The answer of A(n) _______________ occurs when the Moon moves...

Question 20

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km
Moon's average distance from Earth = 384,000 km
Number of arc seconds in 1 radian = 2.06 × 105

Accepted Answer

A)  31 arc seconds 
B)  187 arc seconds 
C)  1750 arc seconds 
D)  1870 arc seconds 
E)  1910 arc seconds 
A)  31 arc seconds 
B)  187 arc seconds 
C)  1750 arc seconds 
D)  1870 arc seconds 
E)  1910 arc seconds

After one _______________. of 18 years 11 1/3 days, the pattern of eclipses repeats.

How many Saros cycles does it take for the same eclipse to occur at about the same location on Earth?

What produces the lunar phases?

If the Moon is too far from Earth during a solar eclipse, the _____ does not reach Earth's surface.

What creates a total lunar eclipse?

Why can't the Moon always pass through the center of the umbra?

The Moon moves slowly against the background of the constellations.

Our calendar divides the year into 30-day periods in recognition of the synodic cycle of the Moon.

Eclipses can occur only when, viewed from Earth, the Sun is near one of the _______________. of the Moon's orbit.

What happens during a penumbral lunar eclipse?

A solar eclipse can only occur when the Moon is ____

The Moon has a dark side that is never lit by the Sun.

Why does the Moon appear reddish during a total lunar eclipse and not go completely dark?

Eclipses can occur only when, viewed from Earth, the Sun is near one of the ____ of the Moon's orbit.

A "larger" Moon on the horizon is an optical illusion.

Any location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates.

What are the two parts of a shadow during an eclipse?

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 10⁵

Here and Now

A User S Guide to the Sky

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 3: Moon Phases and Eclipses

After one _______________. of 18 years 11 1/3 days, the pattern of eclipses repeats.

How many Saros cycles does it take for the same eclipse to occur at about the same location on Earth?

What produces the lunar phases?

If the Moon is too far from Earth during a solar eclipse, the _____ does not reach Earth's surface.

What creates a total lunar eclipse?

Why can't the Moon always pass through the center of the umbra?

The Moon moves slowly against the background of the constellations.

Our calendar divides the year into 30-day periods in recognition of the synodic cycle of the Moon.

Eclipses can occur only when, viewed from Earth, the Sun is near one of the _______________. of the Moon's orbit.

What happens during a penumbral lunar eclipse?

A solar eclipse can only occur when the Moon is ____

The Moon has a dark side that is never lit by the Sun.

Why does the Moon appear reddish during a total lunar eclipse and not go completely dark?

Eclipses can occur only when, viewed from Earth, the Sun is near one of the ____ of the Moon's orbit.

A "larger" Moon on the horizon is an optical illusion.

Any location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates.

What are the two parts of a shadow during an eclipse?

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 105

Here and Now

A User S Guide to the Sky

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 10⁵