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Key Vocabulary. Eclipse Vocabulary Annular eclipse Annulus Penumbra Umbra Lunar eclipse Solar eclipse Eclipse info in the textbook: P42-45. Moon Vocabulary Lunar maria Spring tide N eap tide R ays Sidereal period S ynodic period W aning Waxing Apogee Perigee - PowerPoint PPT Presentation
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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
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