Lunar Phase Sequence - Middle School Earth and Space Science

What is the phase name when exactly half of the Moon's visible disk is illuminated and waxing?

First Quarter. Right half lit in Northern Hemisphere; occurs about 7 days after new moon.
In a model, where is the Moon located relative to Earth and the Sun at Full Moon?

Opposite the Sun on the far side of Earth. Creates a straight line with Earth in the middle.
Which phase comes immediately after Third Quarter in the standard sequence?

Waning Crescent. The last phase before returning to New Moon.
What is the Moon phase when the entire side facing Earth is illuminated?

Full moon. Earth is between Sun and Moon, so we see the fully lit side.
What is the name of the phase when the Moon appears half illuminated and is waxing?

First Quarter. The right half is lit when viewed from the Northern Hemisphere.
Identify the phase that comes immediately after Full Moon in the standard sequence.

Waning Gibbous. Begins waning immediately after the Full Moon phase.
What is the phase name when about $\frac{1}{2}$ of the Moon's face is lit and it is waxing?

First Quarter. Right half is lit; Moon has completed $\frac{1}{4}$ of its orbit.
What is the appearance of a Waning Crescent Moon from the Northern Hemisphere?

Less than half lit; left side illuminated. "Waning" means shrinking; crescents show less than half.
Which phase comes immediately after Waxing Crescent?

First Quarter. Growing from crescent to half-lit appearance.
Identify the phase for a model showing less than half illuminated and increasing each night.

Waxing Crescent. "Crescent" means <50% lit; "waxing" means increasing.
What fraction of the Moon's visible disk is illuminated at First Quarter?

$\frac{1}{2}$ illuminated. "Quarter" refers to the Moon's orbital position, not illumination.
Which phase comes immediately after New Moon in the standard sequence?

Waxing Crescent. The Moon begins showing a thin sliver of light on the right.
Identify the correct phase: the Moon appears as a thin sliver and the lit portion is growing nightly.

Waxing Crescent. Early waxing phase shows a small but increasing lit portion.
Which phase matches this description: more than half lit and the lit portion is shrinking?

Waning gibbous. Gibbous (>50%) combined with waning (decreasing) describes this phase.
Identify the phase: the Moon appears completely illuminated from Earth.

Full Moon. Entire near side reflects sunlight toward Earth.
Which statement is correct: lunar phases are caused by Earth's shadow or by sunlight on the Moon?

By sunlight on the Moon and the viewing angle from Earth. Earth's shadow only causes eclipses, not regular phases.
In a Sun–Earth–Moon model, what lunar phase is shown when the Moon is at a $90^\circ$ angle from the Sun?

A quarter phase (First Quarter or Third Quarter). Right angle creates half-lit appearance from Earth's perspective.
In a flashlight-and-ball model, what does the flashlight represent?

The Sun. Light source illuminates the ball (Moon) in the model.
What is the defining feature of the Third Quarter Moon phase?

Half illuminated; illumination is decreasing (waning). Also called "Last Quarter" as it's the final half-lit phase.
Which term names the repeating pattern of Moon phases caused by the Moon orbiting Earth?

Lunar cycle. The Moon's orbit around Earth creates the repeating phase pattern.
Identify the phase: more than half illuminated and still increasing each night.

Waxing Gibbous. "Waxing" means growing, "gibbous" means more than half.
What does the term "waxing" mean when describing lunar phases in a model?

The illuminated portion visible from Earth is increasing. Moon appears to grow larger each night during this period.
Which phase comes immediately after Full Moon in the standard sequence?

Waning Gibbous. After full illumination, the Moon begins to shrink.
What phase occurs immediately after full moon in the lunar phase sequence model?

Waning gibbous. Moon begins shrinking from fully illuminated appearance.
What is the name of the phase that is less than half illuminated and waning?

Waning Crescent. The final phase before returning to New Moon.
Which term describes lunar phases that show decreasing illuminated area as seen from Earth?

Waning. Occurs as the Moon moves from Full back to New phase.
In a Sun–Earth–Moon model, what causes the changing lunar phases observed from Earth?

Changing viewing angle of the Moon's sunlit half. We see different portions of the sunlit half as Moon orbits.
What phase name describes a Moon that is more than $\frac{1}{2}$ illuminated but not full?

Gibbous. Latin for "humpbacked"; appears swollen but not quite full.
What fraction of the Moon's visible disk is illuminated at Third Quarter?

Half of the visible disk is illuminated. Same as First Quarter but on opposite side of orbit.
What lunar phase occurs when the Moon is between Earth and the Sun?

New Moon. The Moon's unlit side faces Earth, making it invisible.
Identify the phase that comes $3$ steps after New Moon in the standard $8$ -phase sequence.

Waxing Gibbous. New → Waxing Crescent → First Quarter → Waxing Gibbous.
Which term means the illuminated portion of the Moon seen from Earth is increasing?

Waxing. The lit portion grows from New Moon to Full Moon.
What is the defining feature of the First Quarter Moon phase?

Half illuminated; illumination is increasing (waxing). Called "First" because it's the first half-lit phase after New Moon.
Which term describes lunar phases that show increasing illuminated area as seen from Earth?

Waxing. Occurs as the Moon moves from New to Full phase.
What does the term "waxing" mean when describing a lunar phase?

The illuminated portion seen from Earth is increasing. Like waxing a floor, the bright area grows larger.
Which phase comes immediately after Third Quarter in the standard sequence?

Waning Crescent. The Moon shrinks from half-lit to a thin sliver.
Identify the phase for a Moon that is less than half illuminated and the lit part is growing.

Waxing Crescent. Combines 'waxing' (growing) with 'crescent' (less than half).
Which phase comes immediately after New Moon in the standard sequence of lunar phases?

Waxing Crescent. The Moon begins to show a thin sliver of light after being dark.
Which model setup best represents a Full Moon: Sun–Moon–Earth or Sun–Earth–Moon?

Sun–Earth–Moon. Earth between Sun and Moon allows full view of illuminated side.
What does the term "crescent" mean in a lunar phase model?

Less than half of the Moon's disk appears illuminated. Thin, curved shape like a croissant.
What phase name describes a Moon that is less than $\frac{1}{2}$ illuminated but not new?

Crescent. Shows a sliver of light, like a curved C shape.
Identify the Moon–Earth–Sun alignment during New Moon using a simple model.

Sun–Moon–Earth (Moon between Earth and Sun). The three bodies form a straight line with Moon in the middle.
What is the Moon phase when the side facing Earth is not illuminated and appears dark?

New moon. The Moon is between Earth and Sun, so we see the unlit side.
Identify the phase that comes immediately after Waxing Crescent in the 8-phase sequence.

First Quarter. The sequence progresses: New → Waxing Crescent → First Quarter.
Which phase is shown by a model where the Moon is less than half lit and the lit portion is decreasing?

Waning Crescent. Less than half + decreasing = Waning Crescent phase.
Which phase comes immediately after Full Moon in the standard sequence?

Waning Gibbous. The Moon begins shrinking from fully illuminated.
Which lunar phase shows about 50% of the Moon's near side illuminated and is waning?

Third Quarter. Left half is lit as the Moon shrinks from full.
Which lunar phase shows less than half illuminated and is decreasing each night?

Waning Crescent. A thin sliver shrinking toward new moon.
What does the term "crescent" describe about the Moon's appearance from Earth?

Less than half of the visible disk is illuminated. Crescent phases show a thin, curved sliver of light.
Which lunar phase shows less than half illuminated and is increasing each night?

Waxing Crescent. A thin sliver growing toward first quarter.
Which phase comes immediately after New Moon in the standard sequence?

Waxing Crescent. The Moon begins growing from invisible to a thin crescent.
What is the phase name when exactly half of the Moon's visible disk is illuminated and increasing?

First Quarter. Right half is lit when the Moon is waxing.
What is the lunar phase when the Moon is between Earth and the Sun?

New Moon. Moon blocks sunlight to Earth; appears dark from our view.
Which phase is shown when the model Moon is between first quarter and full moon?

Waxing gibbous. Growing from half-lit to fully lit.
Identify the phase: a thin illuminated sliver is visible, and the illuminated part is decreasing nightly.

Waning Crescent. Between Third Quarter and New Moon, showing a small sliver.
Which phase comes immediately after Waxing Crescent in the standard sequence?

First Quarter. The Moon is one-quarter through its orbit from New Moon.
Identify the phase that comes immediately after First Quarter in the standard sequence.

Waxing Gibbous. Continues waxing toward Full Moon after First Quarter.
What is the correct sequence of the eight major lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. Complete cycle from dark to full and back, taking about 29.5 days.
Which lunar phase occurs when the Moon is between Earth and the Sun?

New Moon. The Moon's dark side faces Earth at this position.
What phase name is used when exactly half of the Moon's visible disk is illuminated and increasing?

First Quarter. Called 'First' because it's the first half-lit phase after New Moon.
Which phase is shown when the model Moon is between full moon and third quarter?

Waning gibbous. Shrinking from fully lit to half-lit.
What is the correct sequence of the eight major lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every 29.5 days as the Moon orbits Earth.
What is the lunar phase name when the illuminated portion is decreasing each night?

Waning. Occurs from Full Moon to New Moon as less becomes visible.
What is the defining feature of the Full Moon phase as seen from Earth?

The near side appears fully illuminated. Earth is between Sun and Moon, so sunlight hits the entire near side.
What is the New Moon phase (what does the Moon look like from Earth)?

The Moon appears dark or not visible. Moon is between Earth and Sun, so sunlit side faces away.
What does "gibbous" mean in lunar phase descriptions?

More than half of the Moon's disk appears illuminated. From Latin meaning "hump-backed" due to its bulging shape.
Which lunar phase shows more than half illuminated and is decreasing each night?

Waning Gibbous. Between full and half, shrinking each night.
What does the term "gibbous" mean in a lunar phase model?

More than half of the Moon's disk appears illuminated. Bulging shape, between half and full.
What phase occurs when Earth is between the Sun and the Moon (Sun–Earth–Moon alignment)?

Full Moon. Moon's fully lit side faces Earth when we're between it and the Sun.
In a lamp-and-ball model, what does the lamp represent when explaining lunar phases?

The Sun (the light source). Provides illumination that creates Moon's bright side.
Identify the phase: a thin crescent is visible, and the illuminated part is getting larger nightly.

Waxing Crescent. A growing crescent appears after New Moon.
Which phase name describes a Moon that is less than half lit and decreasing in illumination?

Waning crescent. Crescent means less than half lit; waning means shrinking.
What is the main cause of the changing lunar phases as seen from Earth?

Changing Sun-Earth-Moon positions as the Moon orbits Earth. Different angles create varying amounts of visible sunlit surface.
Which statement correctly describes the Moon's motion that causes the phase sequence in models?

The Moon orbits Earth; the sunlit half stays constant while our view changes. Half always faces Sun; phases result from changing Earth perspective.
In a student model, which object is best to represent the Moon?

A small ball (for example, a foam ball). Small sphere can orbit around "Earth" to show phases.
In a Moon phase model, what causes the changing shape of the lit part you see from Earth?

Changing viewing angle of the Moon's sunlit half. As the Moon orbits, we see different portions of its sunlit side.
What does the term "waning" mean when describing lunar phases in a model?

The illuminated portion visible from Earth is decreasing. Moon appears to shrink each night during this period.
Which phase comes immediately after Waxing Crescent in the standard sequence?

First Quarter. Moon has completed 1/4 of its orbit since New Moon.
Which phase comes immediately before New Moon in the standard sequence?

Waning Crescent. Last shrinking phase before Moon disappears at New Moon.
In a Moon phase model, what fraction of the Moon is always illuminated by the Sun?

Half of the Moon (about $\frac{1}{2}$ ) is always sunlit. The Sun always lights one hemisphere regardless of phase.
In a standard North American view, which side of the Moon is lit during waxing phases?

Right side. Waxing phases grow from right to left.
Identify the phase that comes immediately before new moon in the standard sequence.

Waning crescent. The last visible phase before the Moon disappears at new moon.
Which term means the illuminated portion of the Moon seen from Earth is decreasing?

Waning. The lit portion shrinks from Full Moon to New Moon.
What lunar phase occurs when the Moon is between Earth and the Sun?

New Moon. The Moon's dark side faces Earth when aligned between Earth and Sun.
What is the correct sequence of the eight major lunar phases starting at new moon?

New, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, waning crescent. Complete cycle from new to new, with waxing then waning phases.
In a physical model, which object should be the light source to represent the Sun?

A lamp or flashlight. Provides directional light to simulate the Sun's rays.
Which phase comes immediately before Waning Gibbous in the lunar phase sequence?

Full Moon. The Moon must be fully lit before it starts waning gibbous.
What is the name of the phase when the Moon appears half illuminated and is waning?

Third Quarter. Also called "Last Quarter"; Moon has completed 3/4 orbit.
What is the correct sequence of the 8 main lunar phases starting at New Moon?

New, Waxing Crescent, 1st Quarter, Waxing Gibbous, Full, Waning Gibbous, 3rd Quarter, Waning Crescent. The Moon's orbit creates this repeating 29.5-day cycle.
What is the lunar phase when the Moon's Earth-facing side is not illuminated?

New Moon. The Moon is between Earth and Sun, blocking sunlight from our view.
What is the primary cause of the changing lunar phases seen from Earth?

The Moon's changing position as it orbits Earth. As the Moon orbits, we see different portions of its sunlit half.
Which lunar phases occur when the Moon is about $90^\circ$ from the Sun in the sky?

First Quarter and Third Quarter. The Moon forms a right angle with Earth and Sun at these phases.
What does "quarter" mean in First Quarter and Third Quarter Moon?

Half of the visible disk is illuminated. Moon has completed 1/4 or 3/4 of its orbit around Earth.
Identify the phase: more than half illuminated and decreasing each night.

Waning Gibbous. "Waning" means shrinking, "gibbous" means more than half.
Identify the correct phase: the Moon is more than half lit, but the lit part shrinks each night.

Waning Gibbous. Late waning phase with decreasing illumination past half.
What phase name matches a Moon that is half illuminated and waning?

Third Quarter. Also called Last Quarter, showing the left half illuminated.
What is the phase name when exactly half of the Moon's visible disk is illuminated and decreasing?

Third Quarter. Left half is lit when the Moon is waning.
What is the name of the lunar phase when the Moon is between Earth and the Sun?

New Moon. The Moon's unlit side faces Earth at this position.
Which phase matches this description: less than half lit and the lit portion is growing?

Waxing crescent. Crescent (<50%) combined with waxing (increasing) describes this phase.
What is the Moon phase when about half of the Moon's disk is lit and it is waxing?

First quarter. Called 'quarter' because the Moon has completed 1/4 of its orbit.
Identify the correct phase: the Moon appears completely dark from Earth (no lit part visible).

New Moon. The Moon's sunlit side faces away from Earth at this alignment.
Which phase comes immediately before Third Quarter in the lunar cycle?

Waning Gibbous. The sequence goes: Full → Waning Gibbous → Third Quarter.
Identify the phase that comes immediately after first quarter in the standard sequence.

Waxing gibbous. The sequence goes from half lit to more than half lit when waxing.
What is the name of the phase when the Moon appears as a thin, shrinking sliver before New Moon?

Waning Crescent. "Waning" means shrinking; occurs just before New Moon.
Identify the phase: the Moon looks almost full, but the illuminated part is shrinking nightly.

Waning Gibbous. Nearly full but shrinking occurs after Full Moon.
Identify the phase: less than half illuminated and decreasing each night.

Waning Crescent. "Waning" means shrinking, "crescent" means less than half.
What lunar phase occurs when the Moon is between Earth and the Sun (Moon not visible)?

New Moon. Moon is in line with Sun, so sunlit side faces away from Earth.
Which direction does the Moon orbit Earth when viewed from above the North Pole?

Counterclockwise. Same direction as Earth's rotation when viewed from above.
What does the term "crescent" mean when describing a lunar phase?

Less than half of the Moon's disk appears illuminated. Named for its curved, C-shaped appearance.
What does the term "waning" mean when describing a lunar phase?

The illuminated portion seen from Earth is decreasing. Like waning strength, the bright area shrinks.
Which statement best explains why the Moon has phases when modeled with a lamp and ball?

Phases occur because we see different portions of the Moon's sunlit half. As Moon orbits Earth, our viewing angle of its sunlit side changes.
Which phase is shown when the model Moon is between third quarter and new moon?

Waning crescent. Shrinking from half-lit to invisible.
In a Sun–Earth–Moon model, what stays constant during phases: the lit half or the dark half?

The same half is always sunlit; the visible fraction changes. Half the Moon is always sunlit; our view changes.
Which phase name describes a Moon that is more than half lit and decreasing in illumination?

Waning gibbous. Gibbous means more than half lit; waning means shrinking.
What phase name describes a Moon that is less than half illuminated and increasing?

Waxing Crescent. Between new moon and first quarter; less than half lit and growing.
Which phase comes immediately after First Quarter in the standard sequence?

Waxing Gibbous. The Moon grows from half-lit to nearly full.
What does the term "waning" mean when describing a lunar phase?

The illuminated portion is decreasing. From Old English meaning "to lessen" or "decrease."
Which phase is directly opposite the Sun in the sky (Moon-Earth-Sun alignment)?

Full Moon. Earth sits between the Sun and Moon during this phase.
What is the name of the phase when the Moon is more than half lit and still increasing?

Waxing Gibbous. "Gibbous" means more than half; occurs before Full Moon.
Which phase comes 2 steps after New Moon in the 8-phase sequence?

First Quarter. New → Waxing Crescent → First Quarter in sequence.
What is the lunar phase when Earth is between the Sun and the Moon?

Full Moon. Earth doesn't block sunlight; Moon's far side faces the Sun.
Identify the phase: the Moon is half illuminated, and the illuminated part is decreasing.

Third Quarter. Half-lit and shrinking indicates the third quarter position.
Which lunar phase occurs immediately after Waning Gibbous in the standard sequence?

Third Quarter. Follows the waning sequence from gibbous to half-lit.
What does "crescent" mean in lunar phase names?

Less than half of the Moon's disk is illuminated. Named for its thin, curved shape like a crescent roll.
What lunar phase occurs when Earth is between the Sun and the Moon (fully lit face visible)?

Full Moon. Moon is opposite the Sun, so we see its entire sunlit side.
What is the correct sequence of the eight main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every 29.5 days as the Moon orbits Earth.
What fraction of the Moon's visible disk is illuminated at Third Quarter?

$\frac{1}{2}$ illuminated. Both quarter phases show exactly half the visible disk lit.
Identify the phase: the Moon is half illuminated, and the illuminated part is increasing.

First Quarter. Half-lit and growing indicates the first quarter position.
Identify the phase that comes $2$ steps after Full Moon in the standard $8$ -phase sequence.

Third Quarter. Full → Waning Gibbous → Third Quarter → Waning Crescent.
Identify the phase that comes immediately before Waning Crescent in the 8-phase sequence.

Third Quarter. The sequence goes: Third Quarter → Waning Crescent → New.
What does "gibbous" mean in lunar phase names?

More than half of the Moon's disk is illuminated. From Latin meaning "hump" - Moon appears swollen or bulging.
What is the name of the phase that is less than half illuminated and waxing?

Waxing Crescent. Crescent means less than half of the visible disk is lit.
What is the approximate time for one complete cycle of lunar phases (synodic month)?

About $29.5$ days. This synodic period is longer than the Moon's orbital period.
What fraction of the Moon's visible disk is illuminated at First Quarter?

Half of the visible disk is illuminated. "Quarter" refers to Moon's orbital position, not illumination.
What is the name of the phase when the Moon is more than half lit and decreasing?

Waning Gibbous. Occurs after Full Moon as illumination decreases.
What is the correct sequence of the eight main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. Complete cycle from dark to full and back to dark.
What does "crescent" mean in lunar phase descriptions?

Less than half of the Moon's disk appears illuminated. Named for its curved, C-shaped appearance.
What is the appearance of a Waxing Crescent Moon from the Northern Hemisphere?

Less than half lit; right side illuminated. "Waxing" means growing; crescents show less than half.
What phase name describes a Moon that is more than half illuminated and decreasing?

Waning Gibbous. Between full moon and third quarter; more than half lit but shrinking.
Which phase comes immediately before Waning Gibbous in the standard sequence?

Full Moon. Waning begins immediately after the Moon is fully illuminated.
Identify the phase: the Moon appears mostly lit with a small dark sliver, and it is waxing.

Waxing Gibbous. Between First Quarter and Full Moon, mostly illuminated.
What is the correct sequence of the 8 major lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every $29.5$ days from new to new.
What is the approximate time for the Moon to complete one full cycle of phases (one lunar month)?

About $29.5$ days. One complete phase cycle equals one synodic month.
What does the term "gibbous" mean when describing a lunar phase?

More than half of the Moon's disk appears illuminated. From Latin "gibbus" meaning "hump" or "bulge."
Which phase is halfway between New Moon and Full Moon in the sequence?

First Quarter. Occurs about 7 days after New Moon.
In a Sun–Earth–Moon model, what alignment produces a new moon?

Sun–Moon–Earth (Moon between Earth and Sun). Moon blocks our view of Sun's light reflecting off it.
Which phase comes immediately after Full Moon in the standard sequence?

Waning Gibbous. Light begins decreasing after peak illumination.
Which phase comes immediately after First Quarter in the standard sequence?

Waxing Gibbous. The Moon swells from half-lit to nearly full.
What is the name of the lunar phase when Earth is between the Sun and the Moon?

Full Moon. The Moon's fully lit side faces Earth at this position.
Identify the phase that comes immediately before New Moon in the standard sequence.

Waning Crescent. Last visible phase before Moon disappears at New Moon.
Which term describes lunar phases when the illuminated portion is increasing each night?

Waxing. Occurs from New Moon to Full Moon as more sunlight becomes visible.
What is the correct sequence of the eight major lunar phases starting at new moon?

New, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, waning crescent. The cycle progresses from new to full, then back to new.
Which phase comes immediately after First Quarter in the standard sequence?

Waxing Gibbous. After half-lit, the Moon continues growing toward full.
What is the Moon phase when about half of the Moon's disk is lit and it is waning?

Third quarter. Called 'quarter' because the Moon has completed 3/4 of its orbit.
Which phase comes immediately after New Moon in the standard sequence?

Waxing Crescent. The thin sliver of light grows larger each night.
What is the name of the phase when the Moon appears half illuminated and is waning?

Third Quarter. The left half is lit when viewed from the Northern Hemisphere.
Which phase name describes more than half illuminated and decreasing each night?

Waning Gibbous. "Gibbous" means more than half; "waning" means shrinking.
Identify the phase for a model showing more than half illuminated and decreasing each night.

Waning Gibbous. "Gibbous" means >50% lit; "waning" means decreasing.
Which phase comes immediately after Full Moon in the standard sequence of lunar phases?

Waning Gibbous. The lit portion begins shrinking from its maximum illumination.
What lunar phase occurs when Earth is between the Sun and the Moon?

Full Moon. The Moon's fully lit side faces Earth in this alignment.
In a model, where is the Moon located relative to Earth and the Sun at First Quarter?

About $90^\circ$ from the Sun–Earth line. Forms a right angle in the Sun-Earth-Moon system.
What phase name describes a Moon that is less than half illuminated and decreasing?

Waning Crescent. Between third quarter and new moon; less than half lit and shrinking.
In a student model, which object represents Earth for the observer of the phases?

The student's head (observer at Earth). Eyes view the "Moon" from Earth's perspective.
What stays constant about the Moon in a lunar phase model (ignoring eclipses)?

Half of the Moon is always illuminated by the Sun. The Sun always lights the same amount regardless of phase.
Which lunar phase occurs when Earth is between the Moon and the Sun?

Full Moon. Earth doesn't block light; Moon is opposite the Sun.
What is the phase name when about $\frac{1}{2}$ of the Moon's face is lit and it is waning?

Third Quarter. Left half is lit; Moon has completed $\frac{3}{4}$ of its orbit.
In a Sun–Earth–Moon model, which object provides the light that causes the Moon's phases?

The Sun. The Moon reflects sunlight; it doesn't produce its own light.
What is the correct sequence of the 8 main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every 29.5 days as the Moon orbits Earth.
Which lunar phase occurs immediately after Waxing Crescent in the standard sequence?

First Quarter. Follows the waxing sequence from crescent to half-lit.
What is the lunar phase when the Moon's Earth-facing side is fully illuminated?

Full Moon. Earth is between Sun and Moon, allowing full illumination.
Which phase comes immediately after Full Moon in the standard sequence?

Waning Gibbous. The Moon shrinks from full to nearly half-lit.
Which phase comes immediately after First Quarter in the lunar cycle?

Waxing Gibbous. The sequence goes: First Quarter → Waxing Gibbous → Full.
What is the correct sequence of the eight main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. Complete cycle from invisible to full and back.
What is the correct sequence of the eight main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every 29.5 days in this order.
What lunar phase occurs when the Moon is between Earth and the Sun?

New Moon. The Moon blocks our view of the Sun at this alignment.
What is the phase name when exactly half of the Moon's visible disk is illuminated and waning?

Third Quarter. Left half lit in Northern Hemisphere; occurs about 7 days after full moon.
What is the correct sequence of the 8 main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every 29.5 days as the Moon orbits Earth.
What is the Full Moon phase (what does the Moon look like from Earth)?

The entire near side appears illuminated. Earth is between Sun and Moon, so we see all of sunlit side.
Which lunar phase shows about 50% of the Moon's near side illuminated and is waxing?

First Quarter. Right half is lit as the Moon grows toward full.
What does the term "crescent" mean in lunar phase descriptions?

Less than half of the Moon's disk is illuminated. Named for its curved, C-shaped appearance.
Identify the phase for a Moon that is more than half illuminated and the lit part is shrinking.

Waning Gibbous. Combines 'waning' (shrinking) with 'gibbous' (more than half).
What does the term waxing mean when describing the Moon's appearance from Earth?

The lit portion visible is increasing. After new moon, the illuminated area grows larger each night.
What causes the Moon to appear to change phases as seen from Earth?

Changing view of the Moon's sunlit half as it orbits Earth. We see different portions of the Moon's sunlit side as it orbits.
What does the term "waning" mean when describing the Moon's appearance from Earth?

The illuminated portion is decreasing. From full to new moon, less of the Moon becomes visible each night.
What does the term "waxing" mean when describing a lunar phase?

The illuminated portion is increasing. From Old English meaning "to grow" or "increase."
Which phase name matches a Moon that appears $50\%$ illuminated from Earth in a model?

Quarter moon (first quarter or third quarter). "Quarter" refers to Moon's orbital position, not illumination.
In a Sun–Earth–Moon model, what causes lunar phases: Earth's shadow or viewing angle?

Viewing angle of the sunlit half (not Earth's shadow). We see different amounts of the sunlit half as the Moon orbits.
Which phase is shown when the model Moon is between new moon and first quarter?

Waxing crescent. Growing from invisible to half-lit.
What phase occurs immediately after first quarter in the lunar phase sequence model?

Waxing gibbous. Moon continues growing from half-lit to nearly full.
What phase name is used when exactly half of the Moon's visible disk is illuminated and decreasing?

Third Quarter. Called 'Third' because it's three-quarters through the lunar cycle.
What does the term "crescent" describe in a lunar phase name?

Less than half of the Moon's visible disk is illuminated. Crescent phases show a thin, curved sliver of light.
Which model setup best represents a New Moon: Sun–Moon–Earth or Sun–Earth–Moon?

Sun–Moon–Earth. Moon between Sun and Earth blocks our view of illuminated side.
Which phase comes immediately after Waxing Crescent in the lunar phase sequence?

First Quarter. Following the waxing sequence from crescent to half-lit.
What is the primary cause of the Moon's phases as seen from Earth?

Changing view of the Moon's sunlit half as it orbits Earth. We see different portions of the lit side as the Moon orbits.
What lunar phase occurs when Earth is between the Sun and the Moon?

Full Moon. The Moon's fully lit side faces Earth, appearing as a complete circle.
Which phase comes immediately after First Quarter in the standard sequence of lunar phases?

Waxing Gibbous. The lit portion expands beyond half as it approaches full moon.
Identify the phase for a Moon that is less than half illuminated and the lit part is shrinking.

Waning Crescent. Combines 'waning' (shrinking) with 'crescent' (less than half).
Which term describes lunar phases when the illuminated portion is decreasing each night?

Waning. Occurs from Full Moon to New Moon as less sunlight becomes visible.
What does the term "gibbous" describe in a lunar phase name?

More than half of the Moon's visible disk is illuminated. Gibbous means swollen or bulging on one side.
Identify the phase: the Moon appears completely dark from Earth (not counting Earthshine).

New Moon. Near side faces away from Sun; no direct sunlight visible.
Which phase name describes more than half illuminated and increasing each night?

Waxing Gibbous. "Gibbous" means more than half; "waxing" means growing.
Identify the phase for a Moon that is more than half illuminated and the lit part is growing.

Waxing Gibbous. Combines 'waxing' (growing) with 'gibbous' (more than half).
What phase name matches a Moon that is half illuminated and waxing?

First Quarter. Despite the name, exactly half the visible disk is illuminated.
If the Moon is waning and less than half illuminated, which phase is it?

Waning Crescent. Combines the decreasing trend with the crescent shape.
Identify the primary cause of the changing lunar phases.

The Moon's revolution changes the Sun-Earth-Moon angle. As Moon orbits, we see different portions of its sunlit half.
Which model statement is correct: Do lunar phases occur because Earth's shadow covers the Moon?

No; phases are due to viewing the sunlit half from different angles. Earth's shadow causes eclipses, not regular monthly phases.
In a Sun–Earth–Moon model, which phase occurs when the Moon is between Earth and the Sun?

New Moon. Moon blocks sunlight to Earth, appearing dark from our view.
Which lunar phase shows more than half illuminated and is increasing each night?

Waxing Gibbous. Between half and full, growing each night.
Identify the phase that comes immediately after Waxing Crescent in the standard sequence.

First Quarter. Follows the standard 8-phase sequence as Moon waxes.
What does the term "gibbous" describe about the Moon's appearance from Earth?

More than half of the visible disk is illuminated. Gibbous means swollen or bulging, showing most of the Moon lit.
What is the defining feature of the New Moon phase as seen from Earth?

The near side is not visibly illuminated. Moon is between Earth and Sun, so sunlight hits only the far side.
What causes the Moon's phases as seen from Earth?

The changing view of the Moon's sunlit half as it orbits Earth. Moon orbits Earth, showing different portions of its sunlit side.
In a Sun–Earth–Moon model, what alignment produces a full moon?

Sun–Earth–Moon (Earth between Sun and Moon). Moon is opposite Sun in sky, fully lit from Earth's view.
What does the term "waning" mean when describing lunar phases?

The visible illuminated part is decreasing. From Old English meaning "to lessen" - Moon shrinks nightly.
Which phase name describes a Moon that is less than half lit and increasing in illumination?

Waxing crescent. Crescent means less than half lit; waxing means growing.
What is the name of the phase when the Moon appears half illuminated and is waxing?

First Quarter. "Quarter" means the Moon has completed 1/4 of its orbit.
What does the term waning mean when describing the Moon's appearance from Earth?

The lit portion visible is decreasing. After full moon, the illuminated area shrinks each night.
What is the correct sequence of the eight major lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. The cycle repeats every $29.5$ days in this exact order.
Which statement is correct: the Moon produces its own light, or it reflects sunlight?

The Moon reflects sunlight. The Moon has no light source; it acts like a mirror for the Sun.
Which term means the illuminated portion of the Moon is decreasing each night?

Waning. From full to new moon, the lit portion shrinks.
Identify the phase that comes immediately after full moon in the standard sequence.

Waning gibbous. The sequence goes from fully lit to more than half lit when waning.
Which phase comes immediately after Third Quarter in the standard sequence of lunar phases?

Waning Crescent. The lit portion shrinks to a thin sliver before disappearing at new moon.
In a lamp-and-ball model, what does the student's eye represent when explaining lunar phases?

An observer on Earth viewing the Moon. Shows perspective from Earth's surface.
What is the main cause of the Moon's changing phases as seen from Earth?

The Moon's orbit changes the sunlit portion visible from Earth. As the Moon orbits, we see different amounts of its sunlit side.
Identify the phase: the Moon appears mostly lit with a small dark sliver, and it is waning.

Waning Gibbous. Between Full Moon and Third Quarter, mostly illuminated.
What is the name of the phase that is more than half illuminated and waxing?

Waxing Gibbous. Gibbous means "swollen" or more than half visible.
Which statement is correct about the Moon at any time: how much of the Moon is illuminated by the Sun?

Half of the Moon is illuminated. The Sun always lights half the Moon; we just see varying amounts.
What is the correct statement about Earth's shadow during typical lunar phases?

Earth's shadow is not involved; eclipses are separate events. Phases result from changing viewing angles, not shadows.
What Moon motion in a model explains why the phases repeat in the same order?

The Moon orbits Earth, changing the Sun–Earth–Moon angle. Orbital motion changes our viewing angle of the sunlit portion.
What does the term "waxing" mean when describing lunar phases?

The visible illuminated part is increasing. From Latin meaning "to grow" - Moon appears larger each night.
Which lunar phase shows 0% of the Moon's near side illuminated as seen from Earth?

New Moon. The sunlit side faces away from Earth.
What is the definition of a crescent Moon in terms of the lit fraction you see?

Less than half of the visible disk is illuminated. Crescent means thin, curved shape like a sliver.
What phase occurs immediately after third (last) quarter in the lunar phase sequence model?

Waning crescent. Moon shrinks to a thin sliver before disappearing at new moon.
What lunar phase occurs when Earth is between the Sun and the Moon?

Full Moon. We see the fully sunlit side facing Earth.
What phase name describes a Moon that is more than half illuminated and still increasing?

Waxing Gibbous. Between first quarter and full moon; more than half but not fully lit.
Identify the primary cause of lunar phases in a Sun–Earth–Moon model.

The Moon orbits Earth, changing the sunlit portion we see. Different positions show different amounts of the lit half.
Identify the phase that is between Full Moon and Third Quarter in the standard sequence.

Waning Gibbous. Between fully-lit and half-lit in the waning sequence.
Identify the phase that is between First Quarter and Full Moon in the standard sequence.

Waxing Gibbous. Between half-lit and fully-lit in the waxing sequence.
Identify the phase: a thin illuminated sliver is visible, and the illuminated part is increasing nightly.

Waxing Crescent. Between New Moon and First Quarter, showing a small sliver.
What is the name of the phase when the Moon appears as a thin, growing sliver after New Moon?

Waxing Crescent. "Waxing" means growing; crescent shows less than half lit.
Which phase comes immediately before Waning Gibbous?

Full Moon. Shrinking begins right after maximum illumination.
Which lunar phase occurs immediately after Waxing Gibbous in the standard sequence?

Full Moon. The gibbous phase reaches maximum illumination at full.
Which phase comes immediately after Third Quarter in the standard sequence?

Waning Crescent. The Moon shrinks from half-lit to a thin crescent.
Which phase occurs between Waning Gibbous and Waning Crescent in the standard sequence?

Third Quarter. Halfway through waning, between gibbous and crescent.
What does the term "waxing" mean when describing the Moon's appearance from Earth?

The illuminated portion is increasing. From new to full moon, more of the Moon becomes visible each night.
Identify the phase: less than half illuminated and still increasing each night.

Waxing Crescent. "Waxing" means growing, "crescent" means less than half.
Identify the phase that comes immediately before Full Moon in the standard sequence.

Waxing Gibbous. Last waxing phase before Moon appears completely full.
Which phase best matches this model observation: "less than half lit and decreasing"?

Waning Crescent. Crescent means less than half, waning means decreasing.
What is the name of the phase that is more than half illuminated and waning?

Waning Gibbous. Occurs between Full Moon and Third Quarter phases.
Which term means the illuminated portion of the Moon is increasing each night?

Waxing. From new to full moon, the lit portion grows larger.
Which phase best matches this model observation: "more than half lit and increasing"?

Waxing Gibbous. Gibbous means more than half, waxing means increasing.
What phase occurs immediately after new moon in the lunar phase sequence model?

Waxing crescent. Moon begins showing a sliver of light after being completely dark.
What do the terms waxing and waning describe in a Moon phase model?

Waxing: increasing illumination; waning: decreasing illumination. Terms describe whether visible light is growing or shrinking.
Which term describes the Moon when the illuminated portion visible from Earth is decreasing?

Waning. From full to new moon, the lit portion shrinks each night.
Identify the Moon–Earth–Sun alignment during Full Moon using a simple model.

Sun–Earth–Moon (Earth between Sun and Moon). The three bodies align with Earth in the middle.
Which phase is halfway between Full Moon and New Moon in the sequence?

Third Quarter. Occurs about 7 days after Full Moon.
Identify the phase: exactly half the Moon is lit and the illuminated part is increasing.

First Quarter. Right half lit in Northern Hemisphere; waxing toward full.
Which lunar phase occurs immediately before Full Moon in the standard sequence?

Waxing Gibbous. The gibbous phase builds up to full illumination.
Which phase is shown by a model where the Moon is half lit and the lit portion is increasing?

First Quarter. Half lit + increasing = First Quarter phase.
Which phase name describes a Moon that is more than half lit and increasing in illumination?

Waxing gibbous. Gibbous means more than half lit; waxing means growing.
Which term describes the Moon when the illuminated portion visible from Earth is increasing?

Waxing. From new to full moon, the lit portion grows larger each night.
If the Moon is waxing and more than half illuminated, which phase is it?

Waxing Gibbous. Combines the increasing trend with the gibbous shape.
What does the term "gibbous" mean in lunar phase descriptions?

More than half of the Moon's disk is illuminated. Latin for "hump-backed," describing the bulging shape.
What is the lunar phase name when the illuminated portion is increasing each night?

Waxing. Occurs from New Moon to Full Moon as more becomes visible.
What is the correct sequence of the eight main lunar phases starting at New Moon?

New, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. Moon orbits Earth counterclockwise, creating this predictable cycle.
In a Sun–Earth–Moon model, which phase occurs when Earth is between the Sun and the Moon?

Full Moon. Moon is opposite the Sun, fully lit from Earth's perspective.
What phase occurs when the Moon is between Earth and the Sun (Sun–Moon–Earth alignment)?

New Moon. Moon's unlit side faces Earth when positioned between us and the Sun.
What is the main cause of lunar phases in the Sun-Earth-Moon model?

Changing viewing angle of the Moon's sunlit half as it orbits Earth. We see different portions of the sunlit half as the Moon orbits.
In a standard North American view, which side of the Moon is lit during waning phases?

Left side. Waning phases shrink from left to right.
Which phase comes immediately before Full Moon in the standard sequence?

Waxing Gibbous. Last growing phase before reaching full illumination.
What is the definition of a gibbous Moon in terms of the lit fraction you see?

More than half of the visible disk is illuminated. Gibbous means swollen or bulging, nearly full.

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