earth representation

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The Representation of the Earth The Earth is a sphere flattened at the poles (Geoid). Divided in two equal hemispheres : o Northern Hemisphere or continental includes Asia, Europe, large part of Africa and about half of America. o Southern Hemisphere or maritime. Predominate the seas and oceans. Internenes PiensoyJuego

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Material didáctico para centros bilingües Español - Inglés. Ciencias Sociales, Primero de la ESO.

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Page 1: Earth Representation

The Representation of the Earth

The Earth is a sphere flattened at the poles (Geoid). Divided in two equal hemispheres :

o Northern Hemisphere or continental includes

Asia, Europe, large part of Africa and about half of

America.

o Southern Hemisphere or maritime. Predominate

the seas and oceans.

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Page 2: Earth Representation

The Representation of the Earth Movements of the Earth: Rotation

The Earth rotates on itself. It gives a complete turnaround in 24 hours.

This movement causes days and nights.

Is made from West to East, in the opposite direction clockwise.

The succession of days and nights makes possible to soft the temperatures of the Earth and make easier life.

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Page 3: Earth Representation

The Representation of the Earth

Movements of the Earth: Translation

Movement of Earth around the Sun.

Earth draws an elliptical orbit takes 365 days and 6 hours to travel.

The hours are added on all the month of February every 4 yeras (29 February). The axis inclination of the Earth´s rotation to the ecliptic, is responsible for the succession of the seasons.

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Page 4: Earth Representation

The Representation of the Earth Movements of the Earth: Translation

Summer and Winter: biggest difference in the incidence of the sun´s rays that reach the hemispheres. In a hemisphere´s summer, in another winter. Spring and Autumn: The incidence of sunlight is the same in one hemisphere and in the other. Solstices (summer and winter): maximum difference of light between day and night: 16 to 8 h. Equinoxes (spring and autumn): the same time of light that darkness: 12 hours.

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Page 5: Earth Representation

The Representation of the Earth Time Zones

The Earth is divided into 24 equal parts: time zones (like sections of an orange). All locations in the same zone or time zone have the same time. Due to the rotation of the Earth, sun rises first in the locations in the East, or the direction in which we see the sun rises every morning.

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Page 6: Earth Representation

The Representation of the Earth

Represent any point on Earth using geographic coordinates. Are imaginary lines (parallels and meridians) that apeear on globes and maps forming a sort of grid. Used to calculate the distance between different places on Earth, or to determine its location in the world.

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Page 7: Earth Representation

The Representation of the Earth Latitude

Parallel: Imaginary lines around the Earth parallel to Ecuador. Ecuador is the parallel 0º (the largest circumference. Divide the Earth in two northern and southern hemispheres).

The distance from any point on the Earth to Ecuador (0º), is the Latitude (North or South). It is measured in degrees.

Other smaller parallels are: Tropic of Cancer, Tropic of Capricorn; Arctic Circle and Antarctic Circle.

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Page 8: Earth Representation

The Representation of the Earth Longitude

The meridians are imaginary lines from North to

South, from pole to pole.

The reference meridian is the meridian that passes

through Greenwich (UK). It is meridian 0º.

The distance from any point on Earth to Meridian

0º, is the Longitude (East or West). It is measured in

degrees.

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Page 9: Earth Representation

The Representation of the Earth Location of a point

To locate a point on the Earth need to

know their geographic coordinates:

latitude and longitude.

To represent the Earth cartgraphers have

devised maps that are flat

representations of the whole Earth´s

surface or part of it.

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Page 10: Earth Representation

The Representation of the Earth Projections

The projections are different ways to

make tracing a world map: In the Mercator projection (equivalent):

dimensions are respected but not the shapes.

Peters projection (equivalent): dimensions are respected but not the shapes.

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Page 11: Earth Representation

The Representation of the Earth To learn more

Meridians and Parallels (video)

Imaginary lines (pictures)

The ecliptic and seasons (video)

Cartographic projections (video)

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Page 12: Earth Representation

The Representation of the Earth

Vocational and professional guidance

(for an integrated curriculum)

• Profession: History of Cartography • Industry: Satellite

• Instrument: Astronomical Observatory

• Biography: Américo Vespucio

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