OUR HOME : THE EARTH

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

LESSON OBJECTIVE

My Very Educated Mother Just Served Us Nachos

• 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?

DO YOU KNOW THAT…

DESCRIBE THE EARTH• It is the 3rd 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

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

DIAGRAM OF THE EARTH TILTED TOWARDS THE SUN

REVOLUTION OF THE EARTH AROUND THE SUN

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

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

WHY LIFE IS POSSIBLE ON EARTH?

We Are Fortunate Today!

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.

ADDITIONAL RESOURCES

• http://nineplanets.org/• http://www.bbc.co.uk/science/space/solarsystem/• http://www.classzone.com/books/earth_science/terc/content/investigations/

esu701/esu701page02.cfm?chapter_no=investigation

SUMMARY

1. Solar system comprise of the sun and 8 planets

2. Life is possible on earth because of WAFT

3. The earth rotates on its own axis and revolves around the sun