Moon's Phases

Moon's Phases

Multiple Choice

Preliminary Question # 1

What unit of time on Earth is based on the revolution of the Moon around the Earth?

• year

• month

• day

• hour

Multiple Choice

Preliminary Question # 2

The diagram below shows several of the Moon's positions in its orbit around the Earth. Which of the following pictures shows how the Moon appears from Earth when it is at position 5?

Standard:

SC.8.E.5.9 - Explain the impact of objects in space on each other including the Moon on the Earth, including phases, tides, and eclipses, and the relative position of each body.  

Objectives

1. Recognize that the cause of Moon phases is sunlight reflected by the Moon as it revolves around the Earth.  

 

2. Explain that the Moon's orbit is elliptical due to the gravitational force of the Earth and Sun on its orbit.  

 

Unlike the Sun, the Moon is a solid object that does not emit its own light. You only see the Moon because light from the Sun reflects off the Moon and into your eyes.

The reason why the moon is not moving away from the Earth is because of the GRAVITATION PULL of the Earth to the moon.

​What do you think will happen to Earth without the moon?

Some facts about the Moon, such as its mass, size, and distance from Earth, are shown in the table below.

Fill in the Blank

Check for Understanding # 1

Where is the light we see from the moon coming from?

Multiple Choice

Check for Understanding # 2

How long for a moon to complete one revolution around the Earth?

• about a day

• about a week

• about a month

• about a year

Multiple Choice

Check for Understanding # 3

What cause the movement of moon around the Earth (revolution)?

• Moon's gravity

• Earth's gravity

• Jupiter's gravity

• Mar's gravity

How you do think the moon form?

Moon's Formation

According to the theory, shortly after Earth formed about 4.5 billion years ago, an object about the size of the planet Mars collided with Earth.

​Moon Impact Theory

Moon's Formation

The impact caused materials from the incoming Mars-sized body and Earth’s outer layers to be ejected into space. These materials formed a ring around Earth.

Moon's Formation

Eventually, the materials in the ring cooled, clumped together due to gravity, and formed the Moon.

Multiple Choice

Check for Understanding # 4

According to Moon Impact Theory, how did the moon form?

• The moon came from objects ejected by the sun.

• The moon formed the particles of the object collided the Earth.

• The moon came from the particles from the big explosion on Earth.

• The moon formed from the collision of Mars and Earth.

The Moon also rotates as it revolves around Earth. One complete rotation of the Moon also takes 27.3 days.

​

​The Moon's Motion

Multiple Choice

Check for Understanding # 4

By how long the moon revolve around the Earth?

• 24 hours

• 27.3 days

• 7 day

• 365 days

The portion of the Moon or a planet reflecting light as seen from Earth is called a phase.

​

​The Moon's Phases

Fill in the Blank

Check for Understanding # 5

The portion of the Moon or a planet reflecting light as seen from Earth is called a _________ .

Fill in the Blank

^{Check for Understanding # 6}

^{During this phase, less of the Moon’s near side is lit each night.}

Fill in the Blank

Check for Understanding # 7

During this phase, more of the Moon’s near side is lit each night.

Phases of the Moon

• To avoid confusion you need to identify where the light is coming from.

• Then, always start with New Moon.

Phases of the Moon

• During New Moon, the moon is always located between Earth and Sun

• We see the side of the moon that is not lighted by sunlight.

​Moon

Phases of the Moon

• Waxing = showing more

• Starts with the right side

• Crescent = "C" facing opposite side

Phases of the Moon

• Half moon

• Half right side of the moon is lighted

​PRECEDE

​What comes before...

Phases of the Moon

• Gibbous = "hump" or "bulging"

• Half right side of the moon is lighted

Phases of the Moon

• All of the side of the moon that is lighted is seen on Earth.

• Occurs when Earth is in between Sun and moon

Phases of the Moon

• Waning = showing less

• The lighted side of the moon is getting less and less

Phases of the Moon

• Half moon also

• Half left side of the moon is lighted

Phases of the Moon

• Waning = showing less

• Crescent = "C"

Phases of the Moon

• The cycle will continue

• It will be New moon again

Multiple Choice

Check for Understanding # 8

identify the phase of the moon in the given picture.

• New Moon

• Full Moon

• First Quarter

• Last Quarter

Multiple Choice

Check for Understanding # 9

identify the phase of the moon in the given picture.

• New Moon

• Full Moon

• First Quarter

• Last Quarter

Multiple Choice

Check for Understanding # 10

identify the phase of the moon in the given picture.

• Waxing Crescent

• Waxing Gibbous

• Waning Crescent

• Waning Gibbous

Multiple Choice

Check for Understanding # 11

identify the phase of the moon in the given picture.

• Waxing Crescent

• Waxing Gibbous

• Waning Crescent

• Waning Gibbous

Multiple Choice

Check for Understanding # 12

The moon's phase tonight is last quarter just like what you see in the picture, what will be the phase of the moon after 7 days?

• Full Moon

• New Moon

• First Quarter

• Waning Crescent