2. INTRODUCTION
Definition:
Geography is a social science. Geography is the
study of the Earth surface( mountains, deserts,
oceans, islands,…), inhabitans and the interaction of
humans and their enviroment.
Video : introduction to earth science
3. The Universe is everything we can touch, feel, sense, measure or
detect.
It includes living things, planets, stars, galaxies ...
The Earth Planet belongs to the Solar System which is located in
the Milky Way Galaxy .
Universe definition:
4.
5. It is located in the Solar System, which belongs to the
Milky Way galaxy.
Within the Milky Way there are more than 250 Solar Systems
In our Solar System there are eight planets and five dwarf planets.
- They have different sizes and satellites revolving around.
-All the planets of the Solar System revolve around the Sun.
-The orbits on which they revolve are elliptical
The planets of the Solar System are:
Mercury Venus Earth Mars
Jupiter Saturn Uranus Neptune
0. THE UNIVERSE
The Earth is the only known inhabited planet
6.
7. 2.The Earth is not a perfect sphere because it is flat at poles
4. It is representd with an imaginary axis which goes from pole to pole
3. The surface area of our planet consist of
11. PLANET EARTH. PLANET EARTH
Characteristics of our planet
5. There is also an imaginary circle called Equator
70% water
30% land
Northern
Hemisphere
Southern
Hemisphere
Blue
planet
1. The Earth is the third planet from the Sun
8.
9.
10. Life can exist on the Earth thanks to:Life can exist on the Earth thanks to:
11. The Earth has two kinds of movements
•The earth rotates on its
axis
It moves from west to
east
•It takes 24 hours
•Consequence:
Succession of days and
nights
•Our planet moves around
the sun (at 30 km/sec
following its elliptical orbit)
•It takes 365 days and 6h.
•Every four years : leap year
•Consequences:
a)The seasons
b)Equinoxes and solstices
c)Eclipses
2. MOVEMENTS OF THE EARTH
