The MoonThe Moon

Motions of the MoonMotions of the Moon

Moon takes 27 1/3 days to revolve around Moon takes 27 1/3 days to revolve around EarthEarth

Half of the Moon is always lit up by the SunHalf of the Moon is always lit up by the SunOn Earth we always see the same face of On Earth we always see the same face of

the Moonthe MoonMoon takes 29 ½ days to cycle through Moon takes 29 ½ days to cycle through

moon phasesmoon phasesMoon phasesMoon phases – varying amounts of lighted – varying amounts of lighted

moon seen from Earthmoon seen from Earth

Moon Phases

New MoonNew Moon

Waxing CrescentWaxing Crescent

11stst Quarter Quarter

Waxing GibbousWaxing Gibbous

Full MoonFull Moon

Waning GibbousWaning Gibbous

Last (3Last (3rdrd) Quarter) Quarter

Waning CrescentWaning Crescent

Way to Remember the Moon Way to Remember the Moon PhasesPhases

The The leftleft side is side is litlit up up lastlastWaxWax on (Waxing), on (Waxing), WaneWane off (Waning) off (Waning)

Tides MovieWhat are normal tidal ranges?

Where is the tidal range greatest in the world?

What is the tidal range at this place?

TidesTides

TidesTides – cyclic rise and fall of ocean waters – cyclic rise and fall of ocean watersTwo Two High TidesHigh Tides and Two and Two Two Low TidesTwo Low Tides a a

daydayTides change about every 6 hoursTides change about every 6 hoursTides are caused by the gravitational pull Tides are caused by the gravitational pull

of the Moon and Sun on the waterof the Moon and Sun on the waterMoon revolvingMoon revolving around the Earth and around the Earth and

EarthEarth’’s rotations rotation responsible for tide responsible for tide changeschanges

Tidal RangesTidal Ranges

Spring TidesSpring Tides – Greatest tidal range, during – Greatest tidal range, during New and Full Moon phasesNew and Full Moon phases

When Moon and Sun are in straight line When Moon and Sun are in straight line with the Earthwith the Earth

Neap TidesNeap Tides – smaller tidal range, during – smaller tidal range, during First Quarter and Last QuarterFirst Quarter and Last Quarter

When Moon and Sun are pulling at 90 When Moon and Sun are pulling at 90 degree angle from one anotherdegree angle from one another

TidesTides

EclipsesEclipses

Lunar EclipseLunar Eclipse (Luna = Moon) – Moon (Luna = Moon) – Moon moves into shadow of the Earth at moves into shadow of the Earth at Full Full Moon PhaseMoon Phase

Lasts about 100 minutesLasts about 100 minutesSolar EclipseSolar Eclipse (Solar = Sun) – New Moon (Solar = Sun) – New Moon

moves in between Earth and Sun and moves in between Earth and Sun and casts shadow on Earthcasts shadow on Earth’’s surfaces surface

Last about 7 ½ minutes once every 200 Last about 7 ½ minutes once every 200 years for one location on Earthyears for one location on Earth

Lunar EclipseLunar Eclipse

Total Solar EclipseTotal Solar Eclipse

Partial Solar EclipsePartial Solar Eclipse