4. Earth
Is about 4.5 billion years old,
approximately one-third of the age
of the universe.
According to the Nebula Theory, it
was formed at the same time as the
members of the solar system by
accretion from solar nebula.
5.
6. Earth
During its billion years of evolution,
Earth has gone through a series of
major biological and geological
changes.
7. Geological Events
Volcanic eruptions
Collision of plate boundaries
Creation and destruction of
mountain ranges
Seabeds that took place
Have shaped the face of the
planet.
8. One very large collision is believed
to have caused the tilting of earth
and the formation of its satellite,
the moon.
9. It was suggested that Earth’s crust
and may have formed within about
200 million years after the planets
formation.
10. When seen from outer space, Earth
is a small blue planet bathing in a
film of white clouds and liquid
water.
11. Our planet earth is composed of
different spheres and layers.
12. Layers of the Earth
• Crust
- is the outermost layer of the
Earth.
- it is the layer of the earth where
you live on.
13. • Mantle
- is the layer below the crust and
above the core.
• Core
- it is the innermost part of the
earth.
- subdivided into 2 parts.
14. • Outer core
- is said to be the liquid form of
the core.
• Inner core
- is said to be the solid form of the
core.
15.
16. Life on Earth is possible because all
the major parts namely
atmosphere, hydrosphere,
biosphere and
geosphere work
together as a
complex system.
20. About 70.8 percent is covered with
water.
The hydrosphere(water sphere),
includes all the water found the
oceans, seas, lakes, glaciers
groundwater and vapor.
21. The total volume of water on Earth
is 1.4 billion 𝑘𝑚3
.
Cryosphere-is the Arctic and
Antarctic region.
Cryosphere- is crucial element of
climate change.
22. Geosphere
Is the layer that we are most
knowledgeable of.
It includes the planet’s interior,
rocks, minerals, landforms, and the
processes that shape its surface.
