Earth as Unique Planet

Unique Characteristics of the Earth

1. LESSON 4
AS A UNIQUE PLANET
THE EARTHTHE EARTH

2. THETHE
EARTH'SEARTH'S
UNIQUEUNIQUE
CHARACTERISTICSCHARACTERISTICS
By TeacherBy Teacher
NikkiNikki

3. LESSONLESSON
OBJECTIVESOBJECTIVES
At the end of the
lesson, the students
should be able to
recognize the
uniqueness of the Earth
being the only planet in
the solar system with
properties necessary to
support life.

4. WHY IS EARTH THEWHY IS EARTH THE
ONLY HABITABLEONLY HABITABLE
PLANET IN THEPLANET IN THE
SOLAR SYSTEM?SOLAR SYSTEM?
SHARE WHAT YOU KNOW!

5. LIQUID WATERLIQUID WATER
Life would not have
begun without water.
Is this statement true?
Why?

6. LIQUID WATERLIQUID WATER
Water is the most
abundant molecule in
cells, accounting for 70%
or more of total cell
mass.

7. LIQUID WATERLIQUID WATER
Can our cells function
without water?
CERTAINLY NOT!

8. LIQUID WATERLIQUID WATER
The presence of water
allowed the first
photosynthetic
organisms to thrive.

9. LIQUID WATERLIQUID WATER
Cyanobacteria is an
organism that needs
sunlight, carbon dioxide,
and water to produce
biomass and oxygen.

10. LIQUID WATERLIQUID WATER
Where does water
come from?

11. LIQUID WATERLIQUID WATER
Volcanism
Melting of icy meteors of the
outer regions of the Solar System
that bombarded Earth.
Scientists believe that water on Earth
came from two possible sources:

12. LIQUID WATERLIQUID WATER
Earth is situated in the
HABITABLE ZONE
(GOLDILOCKS ZONE)- the
distance from a star where
liquid water can exist in its
liquid form.

13. LIQUID WATERLIQUID WATER
What will happen if
Earth had been located
a little farther or nearer
to the Sun?

14. LIQUID WATERLIQUID WATER
Water would exist as ice
crystals (if farther from
the Sun) or as part of the
thick atmosphere (if
nearer).

15. HEATHEAT
SOURCESOURCE

16. HEAT SOURCEHEAT SOURCE
Heat drives the different
systems necessary to
support life on Earth.

17. HEAT SOURCEHEAT SOURCE
What are the two sources
of heat on Earth?

18. HEAT SOURCEHEAT SOURCE
Internal Heating
External Heating
Two Sources of Heat
1.
2.

19. HEAT SOURCEHEAT SOURCE
Heat coming from the Earth
is caused by plate
movement and volcanism.

20. HEAT SOURCEHEAT SOURCE
The heat coming from the
sun is in the form of radiation
which enters the Earth.

21. HEAT SOURCEHEAT SOURCE
Some of the heat from the sun
is trapped by layers of gases
that envelope the Earth known
as the atmosphere.

22. HEAT SOURCEHEAT SOURCE
The atmosphere is responsible for
the occurrence of the greenhouse
phenomenon, a natural process
which maintains heat.

23. ATMOSPHEREATMOSPHERE
The atmosphere is a vital
part of photosynthesis. How
important is photosynthesis
to us and why?

24. ATMOSPHEREATMOSPHERE
Photosynthesis ensures
the adequate amount
and flow of gases on
Earth.

25. ATMOSPHEREATMOSPHERE
What will happen if
Earth has no
atmosphere?

26. ATMOSPHEREATMOSPHERE
Without an atmosphere,
the average surface
temperature would be
below freezing.

27. ATMOSPHEREATMOSPHERE
Without an atmosphere,
a planet would receive
an extreme amount of
radiation.

28. ATMOSPHEREATMOSPHERE
The existence of an atmosphere
is mainly due to a planet's
gravity which pulls the
atmosphere from being carried
by the solar radiation.

29. HOPE YOU ENJOYEDHOPE YOU ENJOYED
LEARNING!LEARNING!
Thank you!Thank you!