Kindle subscribe our channel to stay update https://youtu.be/l_J_5rQIsKU Earth as an Inhabitable Planet

1. 11/12/2019Tasneem Ahmed 1

2. 11/12/2019Tasneem Ahmed 2

3. SOLAR SYSTEM
The solar system includes the Sun and all the objects that orbit around it
due to its gravity. This includes things such as planets, comets, asteroids,
meteoroids and moons. The Solar System formed around 4.6 billion years
ago. There are eight planets in the Solar System.
11/12/2019Tasneem Ahmed 3

4. 11/12/2019Tasneem Ahmed 4

5. EARTH
Earth is the third planet in solar
system
it is said to be 4.56 billion years old
It revolves the sun around 365
days
The only planet on which life is
known to exist
11/12/2019Tasneem Ahmed 5

6. EARTH
SCIENCE
• Earth science is the study of
our planet's physical
characteristics, from
earthquakes to raindrops, and
floods to fossils
• It is also called as
“geoscience”
11/12/2019Tasneem Ahmed 6

7. WHY IS THE
EARTH
HABITABLE?
It has a right distance from the Sun
It has a strong magnetic field that
shields us from the electromagnetic
radiation coming from the sun
It has the right chemical materials
that could support life (e.g.
water,oxygen,corbondioxide )
11/12/2019Tasneem Ahmed 7

8. It is unique among
planets in our
solar system for
having water in its
liquid form at the
surface
•The presence of oxygen
in the atmosphere
•Right atmospheric
conditions
11/12/2019Tasneem Ahmed 8

9. EARTH’S
SUBSYSTEMS
•Atmosphere
•Hydrosphere
•Geosphere
•Biosphere
11/12/2019Tasneem Ahmed 9

10. ATMOSPHERE
• Set of layers of gases that
surrounds or protects the planet
that is held by the planet’s gravity
• The atmosphere is made up of a
mixture of gases, mostly nitrogen,
oxygen, argon and carbon dioxide.
• Nitrogen – 78%
• Oxygen – 20.95%
• Argon – 0.93%
• Other Gases – 0.04%
11/12/2019Tasneem Ahmed 10

11. 11/12/2019Tasneem Ahmed 11

12. HYDROSPHERE
• A hydrosphere is the
total amount of water on
a planet.
• All of the oceans, lakes, seas
and clouds are an example of
the hydrosphere.
• Covers 70% of the Earth’s
Surface
• 98% of the water on Earth is
saltwater
11/12/2019Tasneem Ahmed 12

13. HYDROLOGICAL
CYCLE (WATER
CYCLE)
•It is the cycle that explains
the continuous movement of
the water, above or below
the Earth’s surface.
•The sun is the driving
agent of this cycle
11/12/2019Tasneem Ahmed 13

14. 11/12/2019Tasneem Ahmed 14

15. EVAPORATION
It is the first major step in the hydrological cycle
•The sun is the major driving force of this process
for, it will heat the water and it will become water
vapors.
•It involves the molecular change of water from
liquid to gas. 11/12/2019Tasneem Ahmed 15

16. CONDENSATION
•It is the reverse
process of the
evaporation
•It is happening
when the evaporated
water vapor cooled
down to its dew point
•It is usually when
the clouds are formed
11/12/2019Tasneem Ahmed 16

17. PRECIPITATION
It is the water
released from the
condensed clouds
Precipitation occure
in the form of rain,
snow, sleet, or hail
11/12/2019Tasneem Ahmed 17

18. INFILTRATION
•It is the process by which precipitation (water)
was absorbed by the soil and moves into the
groundwater system through rocks and
crakes.
11/12/2019Tasneem Ahmed 18

19. GEOSPHERE
• It is the solid state of Earth
• It includes the structure,
composition, minerals,
and processes of Earth
• Lithosphere – it is a
part of the geosphere
that is composed of
the solid,
• outermost part of the
planet.
11/12/2019Tasneem Ahmed 19

20. 11/12/2019Tasneem Ahmed 20

21. 11/12/2019Tasneem Ahmed 21

22. 11/12/2019Tasneem Ahmed 22

23. BIOSPHERE
• It is the most important subsystem on
Earth
• The biosphere,is the layer of the planet
Earth where life exists.
• biosphere is the system integrating all
living beings and their relationships,
including their interaction with the
elements of the lithosphere, geosphere,
hydrosphere, and atmosphere
• Coined by the geologist Eduard Suess in
1875
11/12/2019Tasneem Ahmed 23

24. 11/12/2019Tasneem Ahmed 24