1. OUR HOME : THE
EARTH

2. LESSON
OBJECTIVE
1. Know the 8 planets that
comprises of the solar system
2. Understand the earth’s
movement: Rotation and
revolution
3. Appreciate why life is possible on
earth: WAFT

3. My
Very
Educated
Mother
Just
Served
Us
Nachos

4. DO YOU KNOW THAT…
• Pluto is not a planet anymore?
• The Solar System is 4.6 billion years old!
• All the objects in the Solar System orbit
the Sun in a counter-clockwise direction.
• The Sun is just one star in 200 billion in
the Milky Way!
So are there really aliens on the other
planets?

5. DESCRIBE THE EARTH
• rd
It is the 3 planet in the
solar system
• It is about 150 million km
from the sun
• The earth is the only planet
that sustains life because it
has WAFT

6. THE EARTHS MOVEMENT : (1)
ROTATION
• Describe rotation:
• Earth rotates on its own
axis in a west-east
direction
• One complete rotation
takes 24 hours
• Effects:
• Results in Day and Night

7. DIAGRAM OF THE EARTH TILTED TOWARDS THE
SUN

8. REVOLUTION OF THE EARTH AROUND THE SUN

9. THE EARTHS MOVEMENT : (2)
REVOLUTION
• Describe revolution:
• Earth tilts at an angle of 23.5
degrees to the plane of its orbit
• Earth revolves around the sun along
an orbit
• One complete revolution takes
365.25 days

10. THE EARTHS MOVEMENT : (2)
REVOLUTION
• Effects
• Revolution and the tilt of the Earth
results in 4 seasons
• Revolution and the tilt of the Earth
also results in different places on
Earth experiencing different lengths
of day and night

11. WHY LIFE IS POSSIBLE ON EARTH?
Elements Purpose
WATER Humans, animals and plants
need water to grow and survive.
AIR All living things require oxygen
for respiration.
FOOD It is our source of energy to
sustain our lives.
TEMPERATURE Suitable temperature is needed
for all species to survive.
We Are Fortunate Today!

12. SUMMARY
• Solar system comprise of the sun and 8
planets
• Life is possible on earth because of
WAFT
• The earth rotates on its own axis and
revolves around the sun
ADDITIONAL RESOURCES
• http://nineplanets.org/
• http://www.bbc.co.uk/science/space/solarsystem/
• http://www.classzone.com/books/earth_science/terc/content/investigations/esu701/esu