Agenda n n n Does the moon rotate

Mid-term check in On a notecard… n n n What is helping you learn

The same side of the moon always faces us. Therefore A. B. The moon

If you lived here… How often would the Sun rise? How often would the

If you lived here… n n How long would a day last? How long

Types of solar eclipses NASA Total solar eclipse

Types of solar eclipses NASA Annular eclipse

Size and distance to scale! Moon Earth line to the Sun Actual tilt of

To moon The moon’s gravity distorts the oceans. Tides occur twice a day!

What about the Sun? Spring tide Sun, moon in a line Neap tide Sun,

What is the phase of the moon on this day? A. B. C. D.

Of course, the Earth is not all water n n Land masses stop water

Summary n n n Lunar eclipses: Sun-Earth-Moon Solar eclipses: Sun-Moon-Earth Phases of the moon

What is a haiku? n 3 line poem: ¡ ¡ ¡ n Line 1

On a note card write 3 haikus 5 7 5 Eclipses Tides Gravity

Example: how does this look from above the solar system? n n n The

How does this look outside? n It rose around 9 pm

Example What time is it? How does the moon look?

How does this look outside? n It will set around 9 am

More on tides… n n Largest tidal range: 50 ft (East coast of Canada)

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Agenda n n n Does the moon rotate? Eclipses Tides

Mid-term check in On a notecard… n n n What is helping you learn the most in this class? What is helping you learn the least? What one thing would you change about this class?

The same side of the moon always faces us. Therefore A. B. The moon does not rotate on its axis The moon does rotate on its axis

If you lived here… How often would the Sun rise? How often would the Earth rise? How often would you see stars?

If you lived here… n n How long would a day last? How long would a night last?

Solar and lunar eclipses

Solar eclipse

Types of solar eclipses NASA Total solar eclipse

Types of solar eclipses NASA Annular eclipse

Total solar eclipse

Annular solar eclipse

Lunar eclipse

Why don’t eclipses occur every month?

Size and distance to scale! Moon Earth line to the Sun Actual tilt of the Moon’s orbit

What causes tides?

To moon The moon’s gravity distorts the oceans. Tides occur twice a day!

Low tide

High tide

What about the Sun? Spring tide Sun, moon in a line Neap tide Sun, moon at right angles

What is the phase of the moon on this day? A. B. C. D. E. Spring tide Sun, moon in a line New or full ¼ or ¾ Waxing Waning Can be any phase

Of course, the Earth is not all water n n Land masses stop water flow Friction between oceans and floor Depth of ocean varies The Earth rotates

Not all surf is created equal

Summary n n n Lunar eclipses: Sun-Earth-Moon Solar eclipses: Sun-Moon-Earth Phases of the moon ¡ From above the solar system, looking south

What is a haiku? n 3 line poem: ¡ ¡ ¡ n Line 1 – 5 syllables Line 2 – 7 syllables Line 3 – 5 syllables Does not have to rhyme

On a note card write 3 haikus 5 7 5 Eclipses Tides Gravity

More on phases of the moon

Example: how does this look from above the solar system? n n n The moon is overhead at 3 am It rose around 9 pm It will set around 9 am

It’s 3 a. m. E W The moon is overhead

Rose at 9 pm W E

How does this look outside? n It rose around 9 pm

Example What time is it? How does the moon look?

How does this look outside? n It will set around 9 am

One month…

More on tides… n n Largest tidal range: 50 ft (East coast of Canada) Typical range: 5 -10 ft Moon’s tidal strength is about 2 times that of the Sun These forces actually cause the Earth and Moon to change shape!