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This guide explores the Earth's rotation on its axis, completing one full turn every 24 hours. It covers the concept of longitude, with lines running from pole to pole, and the significance of the Prime Meridian at 0° longitude. Discover how local time varies with longitude, as locations east of Greenwich experience sunrise earlier than those to the west. Understanding these principles helps comprehend global time zones and their relationship with the Earth's rotation.
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Longitude • Lines of longitude run from pole to pole. • All lines of longitude are the same length. • Longitude lines are not parallel. • The Prime Meridian which passes through Greenwich, UK is 0o longitude. • The highest longitude is 180o. This is also the International Dateline. East of Greenwich Prime
Day length and time • There are 360o in a circle and the Earth rotates one full turn on its axis every 24 hours. • Therefore in one hour the Earth rotates 360/24 = 15o. • If a place is 30o east of your location, local time will be 2 hours later. • If a place is 30o west of your location, local time will be 2 hours earlier.
Time • Time depends on the longitude. • At 12 noon the sun is at its highest angle. • The sun rises in the east and sets in the west. • Places east of Greenwich UK will see sunrise earlier. • Places to the west will see the sunrise later.
