Question 1

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. 
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. C

Question 2

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 C

Question 3

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 x 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 D

Question 4

What is an eclipse season?

Accepted Answer

An eclipse can occur only in a period ca

Question 5

Why can't a lunar eclipse happen at every full moon?

Accepted Answer

Most full moons pass too far n

Question 6

Because the _______________ of the Moon and the Sun vary slightly, the disk of the Moon is sometimes too small to cover the disk of the Sun.

Accepted Answer

The answer of Because the _______________ of the Moon and...

Question 7

What is a new moon?

Accepted Answer

A)  The lunar phase in which the first quarter Moon approaches full moon 
B)  The lunar phase in which Earth's shadow is cast on the Moon 
C)  The lunar phase in which the Moon's shadow is cast on Earth 
D)  The lunar phase in which sunlight illuminates only the far side of the Moon 
E)  The lunar phase in which sunlight illuminates the Earth facing side of the Moon 
A)  The lunar phase in which the first quarter Moon approaches full moon 
B)  The lunar phase in which Earth's shadow is cast on the Moon 
C)  The lunar phase in which the Moon's shadow is cast on Earth 
D)  The lunar phase in which sunlight illuminates only the far side of the Moon 
E)  The lunar phase in which sunlight illuminates the Earth facing side of the Moon

Question 8

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

Accepted Answer

The Answer of totality and waxes and umbra and perigee is...

Question 9

As the illuminated part of the Moon grows larger from new to full, it is said to "wane".

Accepted Answer

A) True 
 B)False

Question 10

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 11

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

Accepted Answer

A)  angular distance 
B)  linear diameter 
C)  linear distance 
D)  angular diameter 
E)  angular momentum 
A)  angular distance 
B)  linear diameter 
C)  linear distance 
D)  angular diameter 
E)  angular momentum

Question 12

What happens during a partial lunar eclipse?

Accepted Answer

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

Question 13

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 14

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 15

What gives the Moon a coppery glow during a total eclipse?

Accepted Answer

A)  Sunlight refracted through Earth's atmosphere 
B)  Sunlight reflected from Earth's surface 
C)  Not all of the sunlight is blocked out 
D)  The artificial light reflected up from Earth's surface 
E)  The spectral emissions of the gases that make up Earth's atmosphere. 
A)  Sunlight refracted through Earth's atmosphere 
B)  Sunlight reflected from Earth's surface 
C)  Not all of the sunlight is blocked out 
D)  The artificial light reflected up from Earth's surface 
E)  The spectral emissions of the gases that make up Earth's atmosphere.

Question 16

The diamond ring effect is a characteristic of which phenomena?

Accepted Answer

A)  full moon 
B)  new moon 
C)  lunar eclipse 
D)  solar eclipse 
E)  solar prominence 
A)  full moon 
B)  new moon 
C)  lunar eclipse 
D)  solar eclipse 
E)  solar prominence

Question 17

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 18

Total lunar eclipses tend to be darkest when the Moon's orbit carries it through the center of the _______________.

Accepted Answer

The answer of Total lunar eclipses tend to be darkest...

Question 19

Between now and 2024, in which year will there be no opportunities for a solar eclipse?

Accepted Answer

A)  2015 
B)  2016 
C)  2018 
D)  2021 
E)  2024 
A)  2015 
B)  2016 
C)  2018 
D)  2021 
E)  2024

Question 20

The safest and simplest way to observe the partial phases of a solar eclipse is to use _______________  projection .

Accepted Answer

The answer of The safest and simplest way to observe...

Exam 3: Moon Phases and Eclipses

What happens during a penumbral lunar eclipse?

What produces the lunar phases?

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 x 105

What is an eclipse season?

Why can't a lunar eclipse happen at every full moon?

Because the _______________ of the Moon and the Sun vary slightly, the disk of the Moon is sometimes too small to cover the disk of the Sun.

What is a new moon?

As the illuminated part of the Moon grows larger from new to full, it is said to "wane".

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

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

What happens during a partial lunar eclipse?

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.

What gives the Moon a coppery glow during a total eclipse?

The diamond ring effect is a characteristic of which phenomena?

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

Total lunar eclipses tend to be darkest when the Moon's orbit carries it through the center of the _______________.

Between now and 2024, in which year will there be no opportunities for a solar eclipse?

The safest and simplest way to observe the partial phases of a solar eclipse is to use _______________ projection .

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

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 x 10⁵