Phases of the moon (Appendix B)

• Now we’ll come back closer to home--- our solar system, starting from Earth, Sun and Moon.

• Bring your notecards on Thursday.

Moon phases are caused by __

A. The Earth’s shadow

B. The Sun’s shadow

C. The shadows of other planets

D. Clouds covering part of the moon

E. None of the above

Phases: What they look like

New Moon

During each “lunar month” of 29.5 days, the Moon changes its appearance.

Phases: What they look like

Waxing Crescent

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Phases: What they look like

First Quarter

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Phases: What they look like

Waxing Gibbous

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Phases: What they look like

Full Moon

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Phases: What they look like

Waning Gibbous

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Phases: What they look like

Third Quarter

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Phases: What they look like

Waning Crescent

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Phases: What they look like

New Moon again!

The moon orbits us

How long does this take?About 29.5 days!

Wikipedia

How does this picture change in one day?

• The Moon rises and sets.• Its appearance (phase) remains the same.

How to determine rise and set times of the moon

1. When is the moon overhead (rather, its highest point in the sky)?

2. What time of day is it? (Where is the Sun?)

It rose about 6 hours earlier It will set about 6 hours later

Example

What time is it?

E W

What about the phase?

The moon is always half lit and half dark

But it does not look like that to us Think about what we see in the sky

Example

What time is it?

E W

Example

What time is it?

E

W

Example

What time is it?

E W

What about outside???(facing south)

East West

The Sun and moon appear to move clockwise across the sky

East West

Put these pictures together…E W

East West

Sunrise

Put these pictures together…

E W

East West

Noon

Put these pictures together…

E W

East West

Sunset

Example

What time is it?

How does the moon look?

E W

Outside

The moon is overhead at noon

It rose around 6 am It will set around 6 pm

East West

6 hours later

What time is it?

How does the moon look?

E W

Outside

It rose around 6 am The moon is overhead

at noon It will set around 6 pm

East West

Example

What time is it?

How does the moon look?

E W

Outside

The moon is overhead at 6 pm

It rose around noon It will set around

midnight

East West

Example

What time is it?

How does the moon look?

E W

Outside

It will set around 6 am It rose around 6 pm The moon is overhead

at midnight

East West

Example

What time is it?

How does the moon look?

E

W

Outside

It rose around 9 pm The moon is overhead

at 3 am It will set around 9 am

East West

On this day, what time does the moon rise?

A. 9 am

B. 3 pm

C. 3 am

D. 9 pm

E. 6 pm

Team activity # 16

Moon phases