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Earth-Sun Relationships
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Earth
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The Sun
Star that is 93 million miles away from earth
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Rotation causes day and night.
• Spinning of the Earth on its imaginary axis.
• 24 hours
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The revolution of the Earth around the sun
• 365 ¼ days
• Seasons due to its tilt during revolution (23.5 degrees).
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A - Summer in the Northern HemisphereB - Summer in the Southern Hemisphere
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SolsticesSolstices• Twice a year, when the tilt of the Earth's is directly towards or
away from the Sun
• Winter Solstice - December 21 - beginning of winter.
• Summer Solstice -June 21 - beginning of summer
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Equinoxes
Sunlight strikes the earth most directly at the equator.
Spring Equinox - March 21
Fall Equinox - September 23
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The Four Seasons: The Effect of the Tilt of Earth’s Rotation Axis
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Affected by relative position of the sun and the Earth
1. Climate
2. Seasons
3. Day and Night