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Understanding Earth's Movements: Rotation, Latitude, and Longitude in Space

Explore the fascinating concepts of Earth's rotation and the coordinate system of latitude and longitude. Learn how the 24-hour movement of the sun, stars, and moon can be explained through Earth's turning on its axis. This guide covers the importance of latitude and longitude in pinpointing locations, the significance of the Equator and Tropics, and how time zones are established based on Earth's rotation. Discover how these elements shape our understanding of spatial geography and timekeeping across the globe.

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Understanding Earth's Movements: Rotation, Latitude, and Longitude in Space

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Presentation Transcript

  1. The Earth Moves in Space

  2. Aristarchus • The 24-hr movement of the sun, the stars, and the moon can be easily explained if the earth were turning. • Rotation • Turning of the earth on its axis

  3. Latitude and Longitude

  4. Coordinate System • A surface grid that has two numbers assigned to it • Means to find locations on the planet

  5. Latitudeand Longitude • The coordinate system is based on two stars • The Sun and the Polaris

  6. Latitude • Latitude values never intersect • Measures North and South of Equator • Max value - 90° North or South • Equator - 0° • Reference line

  7. Latitude The Parallel lines of latitude are horizontal, running from east to west.

  8. Equator • The imaginary line from which latitude is measured • It is half way between the poles, dividing the globe into the northern and southern hemisphere

  9. Tropics • Tropic of Cancer – 23.5° North • This is the farthest north that the sun appears directly overhead • Happens around June 21 • Tropic of Capricorn – 23.5° South • This is the farthest south that the sun appears directly overhead • Happens around December 21

  10. Tropics • Arctic Circle – 66.5 ° North • From the vernal equinox to the autumnal equinox, areas north of this latitude receive 24 hours of daylight • Antarctic Circle – 66.5 ° South • From the autumnal equinox to the vernal equinox, areas north of this latitude receive 24 hours of daylight

  11. Longitude • Measures East and West of the Prime Meridian • Prime Meridian - 0° Greenwich,England • Max value - 180° International Date Line

  12. Longitude The longitude lines run pole to pole

  13. Telling Time • Earth Rotates 15° per hour • Time zones – 15° apart • Each time zone is 1 hour difference

  14. As you go easttime does increaseAs you go westtime gets less

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