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OBJECTIVES:
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Explain the concepts of "time" and "day".
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Explain how longitude creates time zones.
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Explain how the International Date Line operates.
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NOTES:
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Time
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"Simply what a clock reads" - Einstein
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The clock can be the rotation of a planet, sand falling in an hour glass, a heartbeat, or vibrations
of a cesium atom
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Time is represented through change, such as the rotation of the Earth
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Day
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Created by the Earth's movement of ROTATION
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When the Sun is at its zenith, highest point, it is noon there
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Places to the east have a later time than places to the west
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Time Zones
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15º
wide band
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Time zones are not straight lines
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Time zones to the east are later, time zones to the west are earlier
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International Date Line
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A line of longitude
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A Dateline
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Travel eastward across the IDL, a calendar day earlier (Monday changes to Sunday)
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Travel westward across the IDL, a calendar day later (Sunday changes to Monday)
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The TIME remains the same, only the date changes
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