physics

1. EARTH MOVEMENT

2. MOVEMENT OF EARTH
1-Around its axis
Day and Night (24
hours)
The part facing
the sun is
The part away
from the sun is

3. EARTH MOVEMENT
2-Around the sun
4 seasons (365 days)
The hemisphere
where the axis is
tilted towards the
sun
The hemisphere
where the axis is
tilted away from the
sun

4. ORBIT
The path an object takes around another object.

5. OBJECTS ORBITING THE SUN
1.Comet
2.Asteroids
3.Dwarf planets
4.Space probes

6. 1- COMET
Mixture of ice and dust.
[ Water and frozen gases ]

7. 2-ASTEROIDS
Rocks the revolve around the sun

8. 3-DWARF PLANETS
Like Pluto , Eris and Ceres.

9. SPACE PROBES
**They travel to other
planets to collect scientific
information.
**Some orbits around plants
while others land on them

10. THE MOON
1.It rotates on it’s axis.
2.It is roughly spherical in shape.
3.It is considered a natural satellite as
it orbits Earth in orbits.
4.It takes 28 days to orbit Earth.

11. THE PLANETS

12. THEORIES: 1- CLAUDIUS
PTOLEMAEUS (PTOLEMY)
1. He is a Greco-Egyptian astronomer
2. He said that Earth was the center of the universe
and the sun, planets, stars and moon
moves around it.

13. THEORIES : GALILEO GALILEI
1. Is an Italian astronomer
2. He built the telescope and
examines the skies with it.
3. He discovered 4 main satellites of
Jupiter.
4. He came up with the conclusion
that the sun is the center of the
universe and not Earth.