Key VocabularyMoon Vocabulary1. Lunar maria 2. Spring tide3. Neap tide 4. Rays 5. Sidereal period 6. Synodic period 7. Waning 8. Waxing9. Apogee10. Perigee

Moon info in the textbook:P39-41p248-249p285-287

Eclipse Vocabulary1. Annular eclipse 2. Annulus 3. Penumbra 4. Umbra 5. Lunar eclipse 6. Solar eclipse

Eclipse info in the textbook:P42-45

EARTH’S MOONAstronomy 2014

Lunar MariaHuge impact basins that were flooded by lava that now appear as smooth, dark areas

Also called “seas” Cover 17% of the Moon Range from about 200 km-

1200 km in size Physical Features: pits &

craters Rock type: Basalt

Site of Apollo 11 Landing

Selected because of level terrain

Sea of Tranquility (Mare Tranquillitas)

Spring Tide and Neap Tide

Spring Tide:Highest and lowest monthly tidesOccur at the new and full moonCaused by the alignment of the

Sun and Moon with the Earth

Neap TideLower than average tidesOccur at the first and third quarter

moonCreated when the pull of the Sun is

perpendicular to the pull of the Moon on the Earth

Lunar Craters Bowl-shaped depression left by the impact of an

object that struck the lunar surfaceShape is due to material flying out in all directions as a

result of the explosion upon impact

Craters are the most common surface features on the Moon

Major PartsFloorCentral PeaksWallsRimEjectaRays

Bright streaks extending away from the crater sometimes for great distances,

composed of ejecta material.

Crater Rays

Tycho Large, complex impact crater

with terraced walls, flat floor, and central peaks

Most visible crater on the near side of the Moon

85 kilometers wide, 4.8 km deep Formed about 200 million years

ago from an oblique impact Surrounded by a dark ring and

long rays Rays are not distributed equally

in all directionsRays located primarily to the lunar

east, south, and northwestNo rays to the west

Sidereal Period and Synodic Period Sidereal Period: the

Moon’s actual orbital period around the Earth

Synodic Period: time between successive recurrences of the same phase (for example: full moon to full moon)

Waxing and WaningWaxing Face of the moon is increasing into view New Moon Full Moon

Waning Face of the moon is decreasing out of view Full Moon New Moon

Apogee and PerigeeApogee Point at which Moon orbits

furthest from Earth Moon appears smallest

Perigee Point at which Moon orbits

closest to Earth Moon appears largest

ECLIPSESAstronomy 2014

Penumbra Outer regions of an

object’s shadow Lighter than middle

portion

Umbra Center region of an

object’s shadow Darker than outer

portion

Lunar eclipse

Occurs when the Moon passes through Earth’s shadow

Can only occur at full moon

Three Types: Total Partial Penumbral http://www.youtube.com/watch?v=fXPJIDrzo0w

On the back of your packet, sketch this graphic showing the arrangement of the Sun, Moon, and Earth for a lunar eclipse.

Solar eclipse

http://www.youtube.com/watch?v=_201ttTSG30

Occurs when the Moon’s shadow falls on Earth

Can only occur at new moon

Three Types: Total Partial Annular

Annular Solar Eclipse

Type of Solar Eclipse

Occurs when the Moon is directly in front of the Sun, but does not completely block it out

Annulus: Ring of sunlight that is seen around the dark Moon shadow