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Lesson 01 Big Bang Theory The Big Bang Theory http://www.youtube.com/watch?v=aQM4bjVmaYc What is the universe? Universe everything that exists, all _______________ matter and_______________________ everywhere energy Why is it there and where did it come from? Scientists can never answer this! How did it form? There is a theory for this... BIG BANG THEORY The Big Bang Theory is the most widely accepted scientific theory for the origin of the universe. The Big Bang Theory states that: The universe began about _______________ 14 bllion years dense hot ago as an extremely __________, ____________, singularity and compact state (______________________) that underwent an extremely violent expansion _________________. The universe is still expanding today What does "singularity" mean? inside The singularity didn't appear in space; rather, space began _____________ of the singularity. Prior to the singularity, ___________ nothing existed, not space, time, matter, or energy nothing. So where and in what did the singularity appear if not in space? We don't ________ know! We don't know where it came from, why it's here, or even _________ where it is. All we really know is that we are inside of it and at one time it didn't exist and neither did we. Lesson 01 Big Bang Theory What is beyond the expansion? curves Nothing is beyond the expansion space __________ and if you go the edge you will end up back at the start _________________! How do we know that this theory is true? Evidence for the Big Bang Theory There are two main pieces of evidence for the Big Bang Theory: 1. Movement of Galaxies Galaxies are giant star/matter clusters Hubble In 1929 Edwin _________________ discovered that the galaxies that fastest are farthest from us are moving the _____________ away from us single This suggests that the universe originated from a ___________ point Diagram runners in a race as an analogy to explain galaxy movement if all runners start the race at the same point, then the faster runner would always be ahead of the slower runner. If runners started at different points (ie. a slower runner having a head start) then a slower runner could be ahead of a faster one like the runners, if the galaxies started at one point then the fastest moving galaxies should be the farthest from us which is what we see Lesson 01 Big Bang Theory 2. Cosmic Microwave Background Radiation In 1965 two scientists named Penzias and Wilson discovered a Cosmic Microwave Background everywhere radiation (CMB) which is _________________ in the observable _____________________ universe This radiation is thought to be the remnant of radiation from the Big Bang therefore providing evidence that it occurred Lesson 01 Big Bang Theory http://www.space.com/20330cosmic microwavebackgroundexplained infographic.html Lesson 01 Big Bang Theory Lesson 01 Big Bang Theory The Big Bang Theory Timeline Use the Big Bang Timeline website to help you fill in the following table Time after the big bang Temperature Substance/force that is formed 1043 seconds 1032 o C 1028 seconds cooling 108 seconds cooling 0.0001 seconds cooling 3 minutes cooling 300 000 years 730 o C 9 billion years force of gravity stars 269 o C electrons protons and neutrons hydrogen and helium nuclei atoms earth
