Big Bang Theory

Big Bang, Deuterium, Atomic nucleus

Dana Leamaster
February 13, 2013
Informative Speech: The Big Bang Theory
How did the universe begin? How did matter come to exist? We all know that the universe exists, however, this knowledge alone has not satisfied mankind’s quest for further knowledge and understanding. Much time has been spent looking for some clues. Most of what we know is still only a speculation. The three topics I’d like to discuss are what exactly the Big Bang theory is, the first atoms, and the age of the universe.

What exactly is the Big Bang theory? “Fifteen billion years ago a tremendous explosion started the expansion of the universe, known as the Big Bang.” (LaRocco and Rothstein, n.d.) The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something; our universe. After its initial appearance it inflated (the “Big Bang”), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. (“Big Bang Theory- An Overview”, n.d.) The Big Bang theory was introduced in 1927, Georges LeMaitre showed that religion and science, or at least physics, did not have to be incompatible. In 1929, Edwin Hubble discovered the galaxies were moving away at high speeds. The Big Bang was not like an explosion of a bomb going off, but an explosion of space within itself. (“A Science Odyssey: People and Discoveries: Big Bang Theory is Introduced”, n.d.). Just as the Big Bang provided for the foundation of the universe, Hubble’s observations provided for the foundation of the Big Bang theory.

What happened afterwards? In just fractions of the first second after creation, everything began to evolve into what we know today as the universe. Immediately after the Big Bang, the...
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