1. EARTH AND LIFE
SCIENCE 11
THE STRUCTURE AND
ORIGIN OF THE EARTH
MIDTERM
T. MHARK EWIE E. VALDEZ, LPT
2. To state the different hypotheses
explaining the origin of the
universe.
To describe the different
hypotheses explaining the origin of
the solar system.
To explain the current
advancements/discoveries in the
solar system.
To recognize the uniqueness of the
earth, being the only planet in the
solar system with properties
necessary to support life.
To identify and describe the layers
of the earth.
OBJECTIVES
OF THE
SUBJECT
To describe the four subsystems
of the earth.
4. The UNIVERSE
It is an all-space-time, matter and
energy including the solar system.
It includes all the stars, and galaxies,
and content of intergalactic space,
regarded as a whole.
There are three (3) various theories
explaining the origin of the universe:
STEADY STATE, PULSATING, and BIG
BANG
6. 1. STEADY STATE THEORY
It states that the counting of galaxies in our
Universe is constant and fills the empty spaces in
the universe.
This theory proposes that the overall structure of
the universe is always the same at any point in
time and space.
If a body dies, a new body will born.
7.
8. 2. Pulsating theory
It states that the universe is constantly expanding
and contracting.
This theory proposed that the universe is
expanding more and more and then stops slowly
and start contracting.
When it is contracted or compressed firmly, it
explodes and expands again.
9.
10. 3. Big bang theory
It proposes that the entire universe was once
condensed in a very small and compact particle
called PRIMEVAL NUCLEUS.
Based on the theory’s name, the primeval nucleus,
due to extreme pressure, it explodes.
The force of the explosion caused matter to
scatter in any direction forming a universe.
11.
12. The solar system
It is a part of the vast universe.
It is located somewhere in our galaxy
called The Milky Way.
It consists of the sun, being at the
center, minor and major planets, and
other celestial bodies like satellites,
comets, asteroids, and meteoroids.
15. 1. Nebular hypothesis
theory
It proposes that the sun and other celestial
bodies orbiting around it where formed from a
NEBULA – a spinning cloud of gases.
NEBULA are gravitationally unstable, and matter
coalesces within them to smaller denser clumps.
The NEBULA continuously rotates, then collapse
and form stars.
16.
17. 2. Accretion theory
It is a gradual increase in the size of an object by
the build-up of matter due to gravity.
It also states that the PROTOSUN passing through
a cloud of interstellar materials pulled this
material along causing it to swirl around the
protosun.
As the protosun evolved into the sun, the material
it accreted gradually formed the planets and
other revolving bodies.
18.
19. 3. TIDAL THEORY
When the sun is about to form, a large body of
space collide onto it a drawn a gaseous materials
on it.
The large body that collides with the protosun
becomes denser and gradually forms
planetesimals.
These planetesimals give rise to the planets and
their satellites.
23. Solar system model
Create a SOLAR SYSTEM MODEL
using the following materials:
1. Styro Ball
2. Poster Paint
Your project will be graded based on
the given criteria.
