Download OUR PLANET EARTH

INDEX
THE SOLAR SYSTEM
PLANET EARTH
ROTATION OF THE
EARTH: DAYS AND
NIGHTS
REVOLUTION OF
THE EARTH:
SEASONS OF THE
YEAR
KEY WORDS
CONCEPTUAL MAP
SUN
MILKY WAY
UNIVERSE
Contains the
SOLAR SYSTEM
PLANETS
SATELLITES
It is made up of
GALAXIES
Others
ASTEROIDS
OUTER
PLANETS
PLANETS
INNER PLANETS
DWARF
PLANETS
MERCURY
VENUS
EARTH
MARS
JUPITER
SATURN
URANUS
NEPTUNE
LA TIERRA
• It is made up of millions
of GALAXIES.
GALAXIES: They are
concentrations of billion
of stars held together by
gravitational attraction
• Our galaxy is called THE
MILKY WAY.
• Milky Way is a spiralshaped galaxy. Our Solar
System is located in one
of the spirals.
• The Solar System is made up of.
– The INNER PLANETS:
•
•
•
•
Mercury
Venus
EARTH
Mars
– These four planets are the closest to the SUN.
– The OUTER PLANETS:
•
•
•
•
Jupiter
Saturn
Uranus
Neptune
– The inner planets are separated from the outer planets by the Asteroid
Belt.
CLICK ON THE NAME
OF THE PLANET TO
SEE SOME IMAGES
THE PLANETS
THE SURFACE OF VENUS
WATER IN MARS
OLYMPUS MONS
CLICK ON THE
NAME OF THE
PLANET TO
SEE SOME
IMAGES
THE PLANETS
• They are small bodies of rock and metal that orbit the Sun.
• ASTEROID BELT: It separates inner planets from outer
planets.
• They are bodies of rock and metal that orbit a planet
THE EARTH
It is the third inner Planet
of the SOLAR SYSTEM.
It is called BLUE PLANET.
Guess the reason.
• The Earth has a
surface of
510.000.000 km2.
(1000 times Spain’s
surface).
Compare its size
with the rest of the
Planets from the
picture.
• It is not a perfect sphere, it is flatted on the poles, because
its north-south diametre is shorter than its east-west
diametre. It is said that it has a geoid shape.
• The elipsoid used to represent it has a maximum diametre
of 12.756.776 km, and the minimum diametre of
12.713.824 km.
• The Earth is tilted 23º 27’ respect to the
vertical axis.
The consequences will
be explained later.
• The Earth is divided in two
halves, called hemispheres,
by an imaginary line called
Equator.
• The NORTH HEMISPHERE,
called boreal or northern
hemisphere, has more
underwater lands than the
south emisphere.
• The SOUTH HEMISPHERE is
the one which has the most
surface covered by water, it
is also called austral or
meridional hemisphere.
Activity
Observe the distribution
of the lands and
oceans on each
hemisphere and
explain the diferences.
In which hemisphere is
Spain?
Meridians and parallels
 In order to measure the Earth
surface several imaginary lines
have been drawn.
• From West to East, the
PARALLELS, the main is called
EQUATOR and the secondaries
are the TROPICS and POLAR
CIRCLES.
• From North to South, the
MERIDIANS, the main one is
called 0º MERIDIAN or
GREENWICH MERIDIAN.
System of geographical
coordinates.
• Does the Greenwich
Meridian go across Spain?
THE EARTH MOVEMENTS
RESEARCH
THE EARTH
MOVEMENTS
• Earth movement on its axis.
• Lenght: 24 Hours.
• Movement direction: The Earth rotates from
west to east.
• Consequences: Succession of days and nights.
ROTATION OF THE EARTH
TIME ZONES
• The Earth is divided into 24 time
zones.
• Each time zone measures 15º.
• All the places located in the same
time zone have the same time.
TIME ZONES
MOVEMENTS OF THE EARTH
TRANSLATION
TRANSLATION
Movement of the Earth around the Sun.
• Duration:
1 solar year: 365 days
6 hours
9 minutes
6 hours x 4 = 24 hours-> 1 day ->every 4 years
366 days = leap year
CONSEQUENCES
a) The Earth tilt
tilted rotation axis
The two poles
exposed alternatively
to radiation
North
Hemisphere
Solstices
Equinoxes
Summer
Winter
21st June
21st December
largest day
shortest day
Spring
Autumn
21st March
23rd September
day and night
the same
day and night
the same
THE EARTH DOING AN ELIPTIC MOVEMENT
Reinforcement Activity
• Draw a conceptual
map with the
seasonal situation in
the South
Hemisphere.
KEY WORDS
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•
•
•
•
EQUATOR
HEMISPHERE
ROTATION
EARTH
ORBIT
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•
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PLANET
SATELLITE
TIME ZONE
SOLAR SYSTEM
MILKY WAY
Mª Isabel Alvarez
Pilar Bragado
Elvira Cañibano
Rosario García
Teresa García
Teresa Pérez
Rosa Mª Ríos
Esther Sánchez