# CIENCIAS DE LA NATURALEZA 1º DE E.S.O. PRIMER TRIMESTRE FIRST TERM Chapter 2: The Earth in the universe

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CIENCIAS DE LA NATURALEZA 1º DE E.S.O. PRIMER TRIMESTRE FIRST TERM Chapter 2: The Earth in the universe http://forums.yoyogames.com/forums/3/topics/62440https://planetary.org/images/Blue_Dot_big.jpg Planet Earth seen from the Voyager 1 in 1990

2.3. EL MOVIMIENTO DE ROTACIÓN 2.3.1. EL DÍA Y LA NOCHE http://www.youtube.com/watch?v= qqoAEKVRu00&feature=related Click see and answer … ¿Puede ser la misma hora en todos sitios?

HUSO HORARIO: ZONA ENTRE DOS MERIDIANOS CONSECUTIVOS Longitude and Time If you place meridians 15° apart starting with the Prime Meridian, you will divide the Earth into 24 zones. These correspond to the 24 hours in a day. http://www.mapsofworld.com/time-zone-map/maps/world-time-zone.jpg 2.3. THE ROTATION MOVEMENT

As you travel around the world to the east, you gain an hour in time for each zone you cross. If you travel to the west you lose an hour. As you travel around the world to the east, you gain an hour in time for each zone you cross. If you travel to the west you lose an hour. http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif THERE IS A 1 HOUR TIME DIFFERENCE FOR EVERY 15° OF LONGITUDE The world rotates (spins) 360° in 24 hours. 360° / 24 hours = 15° per hour The world has 24 time zones, each l5° apart. 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif EAST INCREASE Time is forward to all places to the east WEST LESS Time is backward to all places to the west 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif If it is 9 p.m. at Position D, what time is it at position C? Position B? East Increase – West Less (1 hr per l5°) 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif If it is 9 p.m. at Position D, what time is it at position C? Position B? East Increase – West Less (1 hr per l5°) 5 p.m. 3 p.m. 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif If it is 1 p.m. at Position X, at which location is the time 5 p.m. ? East Increase – West Less (1 hr per l5°) 2.3. THE ROTATION MOVEMENT

http://www.astro.ufl.edu/~oliver/ast3722/lectures/CoordsNtime/timezon2.gif East Increase – West Less (1 hr per l5°) 5 p.m. If it is 1 p.m. at Position X, at which location is the time 5 p.m. ? 2.3. THE ROTATION MOVEMENT

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