Earth, Moon, and the Sun

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Earth, Moon, and the Sun

• Copy Down Everything in Red, from the next slide
  on!

Objective Students will learn how the
interactions between the Earth, Moon, and Sun
create seasons, moon phases, and eclipses
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Earths Rotation

• The Earth rotates from West to East
• The Sun sets in the West and rises in the East
• One rotation 1 day 24 hours
• Rotation 1040 miles/hr
• Mach1 (sound) 761 mph

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Does the sun rise from the west or east?
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SPEED

• Mach 1 717 mph
• Speed of sound 768 mph
• Space Shuttle 3094 mph
• SR71 4000 mph
• Warp speed Speed of light C670,616,629.4 mph

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Earths Revolution

• It takes the Earth 365 days to orbit the Sun.
  This is called 1 revolution
• 18.5 miles/sec or 1110 mph

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Solar System

• Travels at 43,000 mph

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Milky Way Galaxy

• Rotates at 540,000 mph

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Earths Tilt Causes the Seasons
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Seasons

• Seasons are caused by the tilt of the Earths
  axis (23.5)
• Seasons Winter, Spring, Summer, and Fall
• The equator receives the most constant amount of
  radiation

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Seasons
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Solstice

• June 21 or 22 , Summer Solstice most sunlight
  hours for Northern Hemisphere
• December 21 or 22, Winter Solstice least amount
  of sunlight hours for Northern Hemisphere

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Equinox

• September March Equinox sunlight covers equal
  areas of N and S Hemisphere
• September 22 or 23 Autumnal Equinox
• March 20 0r 21 Vernal Equinox

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Egyptian Calendar

• Original calendars used the cycles of the moon,
  full moon to full moon - 29.5 days
• The Egyptians used 12 - 30 day periods with 5
  additional days

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Romans

• 11 months 30 days or 31 days
• 1 month 28 or 29 days

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Moons Orbit

• The moon is considered to be a natural satellite
• The moon rotates on its axis 1/27.3 days
• Rotation around the Earth 29.5 days
• Rotation matches Earth, so we always see the same
  side

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Moon Phases
S U N
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Waxing gaining light
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Waning Losing light
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Crescent Moon
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Gibbous Moon
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Tides

• The moons gravitational pull creates a bulge,
  which creates a high tide twice a day

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Solar Eclipse

• Moon is between the sun and the Earth
• The shadow on Earth is the eclipse
• Umbra is the darkest part of the shadow
• Penumbra is the lighter shadow

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Lunar Eclipse

• The Earth is between the Sun and the moon
• The Earths shadow on the moon is the eclipse

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The End