Formation of the Universe and the Earth
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13 Terms
Singularity
An infinitely small region of space with zero volume. It was the state of the universe before the Big Bang that acted like a time bomb waiting to boom.
Big Bang Theory
This theory describes how the universe expanded from an initial state of extremely high density and temperature.
Georges Lemaitre
Proposed the Big Bang Theory in 1920
1.96million km per second
The observable universe is expanding at a rate of…
1.) The expanding universe
2.) Abundance of light elements
3.) Cosmic Microwave Background Radiation
3 Key pieces of evidences pointing to the big bang theory
Edwin Hubble
He observed that the galaxies are receding from us
Redshift
This is the term for the receding movement of galaxies from us
Hydrogen and Helium
Most abundant elements in the universe
Expanding Universe
Thought Process for evidence: If universe is receding, it means it must’ve been smaller in the past
Thought Process for evidence: BBT suggest these light elements were formed through fusion of protons and neutrons after big bang
Cosmic Microwave Background Radiation
Thought Process for evidence: The early universe must have been hot, and this radiation is the remnant heat left over from Big Bang
Nucleosynthesis