Moon Phases

Moon Phases

Why does the moon appear to change shape?

​Review - Earth's Movements

• ​Earth, the planet we live on, is a rocky sphere covered in water.

• ​Earth takes one year to revolve around the Sun.

• ​Earth takes one day to rotate on its axis.

• ​The Sun appears to rise and set in Earth's sky, but really, the Earth is rotating so only half of it can see the Sun at one time.

Dropdown

To revolve means to ​

Select answer

, but to rotate means to ​

Select answer

.

Dropdown

A revolution takes one​

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, but a rotation takes one ​​

Select answer

.

Dropdown

Earth revolves around ​

Select answer

, but rotates around ​

Select answer

.

Multiple Choice

This is an example of ​ ___.

• Revolution
• Rotation
• Day
• Night

Multiple Choice

This is an example of ​ ___.

• Rotation
• Revolution
• Day
• Night

Dropdown

The Sun appears to rise in the ​

Select answer

and set in the ​

Select answer

.

Open Ended

"The Sun appears to rise and set but really ____________."

​The Moon

• ​The moon is a rocky sphere too!

• ​It formed when a crash in space caused part of the Earth's crust to break off.

• ​Earth's gravity kept the broken pieces from floating away.

• ​Now, the moon revolves around the Earth due to gravity.

• ​It takes 29 days (or one month) for the Moon to revolve one time.

Multiple Choice

The moon is shaped like a ____.

• Cone

• Prism

• Sphere

• Pyramid

Open Ended

"The moon was formed when ______."

Multiple Choice

The moon takes one month to ____ around the Earth.

• Rotate

• Revolve

Multiple Choice

The moon takes one month to revolve around ____.

• the Earth

• the Sun

• its axis

Multiple Choice

The moon takes _____ to revolve around the Earth.

• One Day

• One Month

• One Year

Multiple Choice

What force keeps the moon revolving around the Earth?

• Momentum

• Pressure

• Gravity

​Moonrise and Moonset

• ​Just like the Sun, the moon appears to rise in the East, travel across the sky, and set in the West, once per day.

• ​Just like the Sun, it is not really the moon that is moving across the sky.

• ​Instead, when Earth rotates, the moon appears to move.

Dropdown

The moon appears to rise in the ​

Select answer

and set in the ​

Select answer

.

Multiple Choice

The moon appears to rise and set because ____.

• It is traveling across the sky.

• Earth is rotating.

• It is chasing the Sun.

​Moon Phases

• ​The moon also appears to change shape in a repeating pattern.

• In reality, the moon is always the same shape.

• Like Earth, ​the moon does not make its own light. It reflects the Sun's light.

• ​Like Earth, only one half of the moon can see the Sun at one time.

• ​The shape of the moon that we see depends on where the moon is in its revolution around Earth.

Multiple Choice

The moon appears to change shape, but in reality, ____.

• It is changing shape.

• It is always the same shape. 

Multiple Choice

What fraction of the moon can see the Sun at one time?

• One-third (1/3)

• One half (1/2)

• One quarter (1/4)

Multiple Choice

The shape of the moon we can see is called its ____.

• Phase

• Mutation

• Morphograph

Multiple Choice

We see the moon in different phases because _______.

• The moon is revolving

• The moon is rotating

• The Earth is rotating

​Key Phases

• ​During a new moon, we cannot see any of the moon. The dark side is facing Earth.

• ​During a quarter moon, we see a half-circle. Half of the light side is facing Earth.

• ​During a full moon, we see a full circle. The light side is facing Earth.

• ​It takes 1 month for a full cycle of the moon's phases.

Multiple Choice

What phase is this?

• New Moon

• Quarter Moon

• Full Moon

Multiple Choice

What phase is this?

• New Moon

• Quarter Moon

• Full Moon

Multiple Choice

What phase is this?

• New Moon

• Quarter Moon

• Full Moon

Match

Match the phase to its name.

New Moon

Full Moon

Quarter Moon

• New Moon

• Full Moon

• Quarter Moon

Multiple Choice

What is the name of the moon phase in the diagram?

• New Moon

• Full Moon

• Quarter Moon

Multiple Choice

What is the name of the moon phase in the diagram?

• New Moon

• Full Moon

• Quarter Moon

Multiple Choice

What is the name of the moon phase in the diagram?

• New Moon

• Full Moon

• Quarter Moon

Match

Match the diagram to its name.

Full Moon

Quarter Moon

New Moon

• Full Moon

• Quarter Moon

• New Moon

Multiple Choice

Today there is a New Moon. 

I can see another New Moon in _____. 

• One Day

• One Month

• One Year

Open Ended

"We see phases of the moon because ___.

We see phases of the moon but really ___."