Question 1

The sidereal period is _______________ days long, the time it takes the Moon to circle the sky once and return to the same position relative to the stars.

Accepted Answer

The answer of The sidereal period is _______________ days long,...

Question 2

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 3

Why do prominences appear pink during a solar eclipse?

Accepted Answer

A)  Because of the high temperature of the gases 
B)  Because the photosphere being blocked out 
C)  Because of the placement of the lunar disk over the Sun 
D)  Because the prominences interact with Earth's magnetic field 
E)  Because different gases are being combined in the chromosphere 
A)  Because of the high temperature of the gases 
B)  Because the photosphere being blocked out 
C)  Because of the placement of the lunar disk over the Sun 
D)  Because the prominences interact with Earth's magnetic field 
E)  Because different gases are being combined in the chromosphere

Question 4

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 5

The _______________ formula expresses the relationship of the linear (true) diameter, the angular (apparent) diameter, and the distance, of any object.

Accepted Answer

small-angl

Question 6

Describe all that you would see during a total eclipse of the Sun.

Accepted Answer

During a totally eclipsed Sun, the Moon'

Question 7

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 8

Due to the high temperatures of the gas, what color do prominences appear as during a solar eclipse?

Accepted Answer

A)  copper 
B)  blue 
C)  pink 
D)  violet 
E)  teal 
A)  copper 
B)  blue 
C)  pink 
D)  violet 
E)  teal

Question 9

How many times does the Moon cross the ecliptic each month?

Accepted Answer

A)  none 
B)  once 
C)  twice 
D)  three times 
E)  four times 
A)  none 
B)  once 
C)  twice 
D)  three times 
E)  four times

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

The geometry of a solar eclipse is the same as that of a lunar eclipse.

Accepted Answer

A) True 
 B)False

Question 12

Since the Moon is about 0.5 degrees in angular diameter, about how far does it move in 24 hours across the background of the constellations?

Accepted Answer

A)  0.5 degrees 
B)  1.0 degree 
C)  2 degrees 
D)  9 degrees 
E)  13 degrees 
A)  0.5 degrees 
B)  1.0 degree 
C)  2 degrees 
D)  9 degrees 
E)  13 degrees

Question 13

What does a waxing gibbous moon mean?

Accepted Answer

A)  The changing Moon between full moon and third quarter 
B)  The changing Moon between third quarter and new moon 
C)  The changing Moon between first quarter and full moon 
D)  The changing Moon between new moon and first quarter 
E)  The changing Moon between first and third quarters 
A)  The changing Moon between full moon and third quarter 
B)  The changing Moon between third quarter and new moon 
C)  The changing Moon between first quarter and full moon 
D)  The changing Moon between new moon and first quarter 
E)  The changing Moon between first and third quarters

Question 14

The angular diameters of the Moon and Sun vary slightly because the orbits of the Moon and Earth are slightly elliptical.

Accepted Answer

A) True 
 B)False

Question 15

Which part of the Sun is observable during a total solar eclipse?

Accepted Answer

A)  core 
B)  solar disk 
C)  sun spots 
D)  photosphere 
E)  chromosphere 
A)  core 
B)  solar disk 
C)  sun spots 
D)  photosphere 
E)  chromosphere

Question 16

What unit would best describe the linear diameter of a planetary body?

Accepted Answer

A)  arc seconds 
B)  arc minutes 
C)  degrees 
D)  kilometers 
E)  radians 
A)  arc seconds 
B)  arc minutes 
C)  degrees 
D)  kilometers 
E)  radians

Question 17

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 18

During a total solar eclipse, what part of the Sun is often visible that we normally cannot see?

Accepted Answer

A)  core 
B)  CMEs 
C)  corona 
D)  photosphere 
E)  solar wind 
A)  core 
B)  CMEs 
C)  corona 
D)  photosphere 
E)  solar wind

Question 19

A(n) _______________ is the changing phase the week between first quarter and full moon.

Accepted Answer

The answer of A(n) _______________ is the changing phase the...

Question 20

If the Moon passes only partially into the umbra, we witness a(n) _______________.

Accepted Answer

partial lu

Exam 3: Moon Phases and Eclipses

The sidereal period is _______________ days long, the time it takes the Moon to circle the sky once and return to the same position relative to the stars.

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

Why do prominences appear pink during a solar eclipse?

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

The _______________ formula expresses the relationship of the linear (true) diameter, the angular (apparent) diameter, and the distance, of any object.

Describe all that you would see during a total eclipse of the Sun.

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

Due to the high temperatures of the gas, what color do prominences appear as during a solar eclipse?

How many times does the Moon cross the ecliptic each month?

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

The geometry of a solar eclipse is the same as that of a lunar eclipse.

Since the Moon is about 0.5 degrees in angular diameter, about how far does it move in 24 hours across the background of the constellations?

What does a waxing gibbous moon mean?

The angular diameters of the Moon and Sun vary slightly because the orbits of the Moon and Earth are slightly elliptical.

Which part of the Sun is observable during a total solar eclipse?

What unit would best describe the linear diameter of a planetary body?

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

During a total solar eclipse, what part of the Sun is often visible that we normally cannot see?

A(n) _______________ is the changing phase the week between first quarter and full moon.

If the Moon passes only partially into the umbra, we witness a(n) _______________.

Here and Now

A Users Guide to the Sky

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters