Table of Contents Title: Natural Time Periods (Lunar Month) Page #: 18 Date: 9/24/2012 Title:...
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Transcript of Table of Contents Title: Natural Time Periods (Lunar Month) Page #: 18 Date: 9/24/2012 Title:...
Table of Contents Title: Natural Time Periods (Lunar
Month) Page #: 18 Date: 9/24/2012
Objective Students will explore Lunar Phases
by creating a Lunar Phase flipbook.
Words of the Day Waning: Getting Smaller Waxing: Getting Bigger Elongation: The angular distance of
a planet or other celestial body from the sun.
Natural Time Periods
Natural Time Periods:•1 Year = 365 and 1/4 days (Revolution)•1 Day = 24 hours (Rotation)
•Weeks and Months modify the natural time periods.
Natural Time Periods
Lunar Month:• There are 29 and 1/2 days in a
Lunar Month There are 4 phases of the Lunar
Month1. New Moon
We can’t see it
Ø First Quarter
Ø Full Moon
Ø Last Quarter
Natural Time Periods
Lunar Month:• The 4 phases of the lunar month
match the four weeks of the calendar month.
• Results in a 12 month year because 365 divided by 29 and 1/2 ≈ 12
• Solar Day: The time it takes for Earth to make one full rotation relative to the sun.
• Sidereal Day: The time it takes for Earth to make one full rotation relative to a point in space Constellations.• Sidereal Day is 4 minutes shorter than
Solar Day.