Download the solar system - Title: Brains at school

THE SOLAR
SYSTEM
Prof. Nadia Șerban
Liceul “Matei Basarab” Craiova
The Solar System
consists of the Sun and
the bodies that revolve
around it (planets,
satellites, comets,
meteorites).
When was. our solar
system formed?
The solar system was
formed 5 billion years
ago from a huge
cloud of gas
and cosmic dust
under the effect of
gravity.
How does our solar
system function?
The gravitational force
of the Sun makes
the planets spin around it
on paths called orbits.
What are the planets
in our solar system?
Until recently, there was a ninth planet,
Pluto, but it was discovered that it is
a dwarf planet and it is outside the
Solar System
The Sun
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-
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It is a huge ball of gas, throwing
flames like a dragon.
It has about 5 billion years
It is at the middle of its life: it will
become too huge and too hot, then it
will explode and disappear.
It consists of two gases: hydrogen and
helium, producing thermonuclear
reactions and giving out light and
warmth
The exterior part of the sun - the solar
corona can be seen with a naked
eye during eclipses.
The Planets
•
They have a spherical shape,
they have no heat and light; they
receive heat and light from the
stars
The terrestrial planets are similar
in size to the Earth, they are solid
and made of rocks.
• Mercury
• it looks as a black dot that
separates the Sun
• It is the hottest,
• it has not atmosphere,
• Not satellites
• It is covered with craters
Venus
• it is the brightest planet, being
called The Morning Star or The
Shepherd’s Star, it is visible
only in the morning and in the
evening, when shepherds take
the sheep to the field or return
home with them .
• - It has a dense atmosphere
which accounts for its high
temperature (450º C) and has
no satellites.
• - It is the twin sister of the
Earth in size and relief.
EARTH
•
It is the third planet from the
sun.
• It has one natural satellite, The
Moon
• The atmosphere, consisting of
78% nitrogen and 21%
oxygen, protects us from falling
meteorites and from the
harmful radiation of the sun
• The surface is covered with
water (71%) and dried land
(29%), hence the name The
Blue Planet.
MARS
- Also named "the red planet"
because of the iron oxide in the
rocks , which gives the reddish
color.
-It has two small satellites,
Phobos and Deimos, probably
asteroids which were captured by
the planet and the polar ice caps
at the poles.
- It is intensely explored by probes
and robots to discover if there are
any life forms or water.
Gas or Giant planets
they consist of gases: hydrogen and helium, they have rings and
many satellites
• Jupiter
• The giant planet of the solar
system, it is 11 times larger
than The Earth, with less
visible rings.
• It has 67 satellites, the largest
having been discovered by
Galileo Galilei – Io, Europa,
Callisto, Ganymede
•
The different colors are due to
the composition of clouds and
gases and to the ceaseless
storms
Saturn
• The planet with rings, it is 9
times bigger than The Earth.
• It is made of gases, being so
light that it could float on an
ocean.
• It has seven distinct rings
composed of dust, gases and
ice.
• It has 62 satellites, the biggest
of them is Titan, which is larger
than Mercury
URANUS
• Also named the inverted
planet, having an different
inclination from that of other
planets.
• It is surrounded by 11 rings
which are very thin.
• It is made of hydrogen,
helium and methane.
• It has 27 satellites.
• The greenish colour is due to
the way in which it reflects the
sunlight.
NEPTUN
• it is the coldest planet.
• it is composed of hydrogen,
helium and methane, which
give an apparent blue color.
• It has 13 satellites; Triton is
the biggest.
• It can’t be seen with a naked
eye.
• It is hit by winds and violent
storms.
Pluto
• Until recently (2006), there was
a ninth planet, Pluto, but it was
discovered that it is a dwarf
planet and it is outside the
Solar System.
Pluto and
his
satellite,
Chanon
Meteorites
• Meteorites – they
are chunks of rock
and iron, which can
fall on The Earth
and form craters.
Comets
• They are tailed stars,
frozen bodies of dust and
gas.They travel through
space and can provide
information about the way
the solar system is
formed.
Asteroids
• They are fragments of rock
formations left behind by the
solar system about 4.6 billion
years ago
• They moves into the space
between Mars and Jupiter
• There are millions of bodies of
different sizes , the largest is
Ceres
The artificial satellites
• Artificial satellites have
become an indispensable part
of today's technology. They
are used for various purposes,
from providing long distance
telephone connections, to
direct broadcasting of
television and radio
programes, and to obtaining
geological information about
the weather or for other
facilities.
Sputnik 1, the first artificial
satellite, was released on
October 4, 1956
Feedback
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1. The brightest planet is ...
2. The Inverted planet is called ...
3. Earth's natural satellite is …
4. Jupiter is a ………..planet .
5. The coating which protects the Earth from
meteorites fall is ...
Homework
• 1.Photos with your notebook- making
notes. (deadline 31 st May 2016)
• 2. Use a mnemonic device for learning
easily the order of the planets in our
solar system. (deadline 31 st May 2016)