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Earth-Sun-Moon SystemTides (pg. 458-60)
and Eclipses (pg. 628-29)
Regents Earth Science
With Ms. Connery
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Eclipses and Tides Vocabulary
Eclipses
• solar eclipse
• lunar eclipse
• total eclipse
• umbra
• corona
• partial eclipse
• penumbra
Tides
• gravity
• daily cycle of high
and low tides
• spring tides
(extremes)
• neap tides
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The changing
positions of the
earth, sun and
moon:
- cause the
daily tide cycle,
and
- sometimes
creates
eclipses.
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Tides depend on the alignment of the
Earth, Sun and Moon, too!
But first, what are tides?
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Tides happen in a daily cycle related to Earth’s
rotation and the Moon’s gravity field.
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Spring Tide – extremes twice
each month when moon sun
and Earth are aligned in a
row (on either side)
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Neap tide – reduced tide
range when moon and sun are
positioned at 90o
http://ithacasciencezone.com/earthzone/lessons/09space/tide/tide.htm
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Partial Solar Eclipse 2002
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Antarctic total solar eclipse 2003
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What is a Lunar Eclipse
4/8/2005