PHYSICAL SCIENCE
(Brief Notes by Apole, Noella Joy S.)
It is a branch of natural science that studies non-living systems, in contrast
to life science. It in turn has many branches, each referred to as a "physical
science", together called the "physical sciences".
Cosmology – is a branch of astronomy that involves the origin and evolution of the
universe, from the Big Bang to today and on into the future.
3 Cosmic Stages through which specific groups of elements were formed:
Big bang nucleosynthesis formed the light elements (H, He, and Li)
Stellar formation and evolution formed the elements heavier than Be to Fe
Stellar explosion, or supernova formed the elements heavier than Fe
Big Bang theory/Big Bang model – explains how the elements were initially formed
the formation of different elements involved many nuclear reactions, including
fusion, fission and radioactive decay. Part of its proof is the amounts of H and He
we have in the universe today.
Stages of the Bigbang Theory
1. Singularity – a point in space and/or a moment in time where the universe was
infinitely hot and dense.
2. Inflation – is a theory of exponential expansion of space in the early universe.
The inflationary epoch lasted from 10−36 seconds.
3. Nucleosynthesis – is the process that creates new atomic nuclei from pre-
existing nucleons, primarily protons and neutrons.
4. Recombination – refers to the epoch at which charged electrons and protons
first became bound to form electrically neutral hydrogen atoms.
5. Annihilation – in physics, reaction in which a particle and its antiparticle collide
and disappear, releasing energy.
(Brief Notes by Apole, Noella Joy S.)
It is a branch of natural science that studies non-living systems, in contrast
to life science. It in turn has many branches, each referred to as a "physical
science", together called the "physical sciences".
Cosmology – is a branch of astronomy that involves the origin and evolution of the
universe, from the Big Bang to today and on into the future.
3 Cosmic Stages through which specific groups of elements were formed:
Big bang nucleosynthesis formed the light elements (H, He, and Li)
Stellar formation and evolution formed the elements heavier than Be to Fe
Stellar explosion, or supernova formed the elements heavier than Fe
Big Bang theory/Big Bang model – explains how the elements were initially formed
the formation of different elements involved many nuclear reactions, including
fusion, fission and radioactive decay. Part of its proof is the amounts of H and He
we have in the universe today.
Stages of the Bigbang Theory
1. Singularity – a point in space and/or a moment in time where the universe was
infinitely hot and dense.
2. Inflation – is a theory of exponential expansion of space in the early universe.
The inflationary epoch lasted from 10−36 seconds.
3. Nucleosynthesis – is the process that creates new atomic nuclei from pre-
existing nucleons, primarily protons and neutrons.
4. Recombination – refers to the epoch at which charged electrons and protons
first became bound to form electrically neutral hydrogen atoms.
5. Annihilation – in physics, reaction in which a particle and its antiparticle collide
and disappear, releasing energy.
