1. EARTH &
LIFE
SCIENCE
Module 1 & 2
ORIGIN AND STRUCTURE OF
EARTH
(The Planet Earth & It’s Subsystem)
Prepared By:
EUGENE BERT D. SANTIAGO
Special Science Teacher I | Subject Teacher
3. EARTH & LIFE SCIENCE
It presents the history of the Earth through
geologic time. It discusses the Earth's
structure, composition, and processes.
Issues, concerns, and problems pertaining
to natural hazards are also included. It
also deals with the basic principles and
processes in the study of biology.
14. EARTH’S SUBSYSTEMS
There are four (4) subsystems:
1. Atmosphere (air)
2. Geosphere (earth/land)
3. Hydrosphere (water)
4. Biosphere (life)
15. ATMOSPHERE
It is the gaseous layer above the Earth’s surface, primarily
composed of 78% nitrogen and 21% oxygen. Other gases
like argon, carbon dioxide, carbon monoxide, ozone, and
other inert gases made the remaining 1%.
It supports life by providing OXYGEN for animals and
CARBON DIOXIDE for plants.
It also supports life indirectly by regulating climate.
It serves as a blanket for harmful radiation during the day
and keeps the earth warm during the night.
16. GEOSPHERE
The geosphere includes all the rocks that make up Earth,
from the partially melted rock under the crust, to ancient,
towering mountains, to grains of sand on a beach.
It includes the core, mantle, and crust of the Earth.
It also provides a habitat for different life forms.
17. HYDROSPHERE
The hydrosphere includes water that is on the surface of
the planet, underground, and in the air.
A planet's hydrosphere can be liquid, vapor, or ice.
Just like the geosphere, it also provides a habitat for
different life forms.
18. BIOSPHERE
The biosphere is made up of the parts of Earth where life
exists.
The biosphere extends from the deepest root systems of
trees, to the dark environment of ocean trenches, to lush
rain forests and high mountaintops.
Since life exists on the ground, in the air, and in the water,
the biosphere overlaps all these spheres.