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Introduction to the Big Bang Theory The Origin of the Universe You walk into a theater, on the screen, you see car parts flying away in all directions . . . What just happened? State your observation.________________________________ ________________________________________________ ________________________________________________ State your hypothesis.________________________________ ________________________________________________ ________________________________________________ Give your evidence for your hypothesis.__________________ ________________________________________________ ________________________________________________ Can you make a statement about an event even though you didn’t witness it happening?______________________ Play the movie backwards • If you could play the movie backwards, what would the objects be doing?_______________________________ _____________________________________________ _____________________________________________ _____________________________________________ • Following that thought back to the very beginning…what was originally on screen?__________ _____________________________________________ _____________________________________________ _____________________________________________ Edwin Hubble (1889-1953) Astronomer who made several discoveries that provided clues for how our universe began: 1. ___________________________________ are “building blocks” of the universe. - __________________________________: All existing matter, energy & space 2. The Milky Way (Earth’s galaxy) was 1 galaxy among billions of others. - __________________________________: Is made up of a cluster of _________________________ (solar systems). There are __________________________________ of galaxies within the universe. 3. The galaxies are __________________________________________ ___________________________________ from each other. The Big Bang Theory – A ______________________________ ________________________ that states that the _____________________________ was created from a high density of __________________________ (called a “_____________________________”) that _______________________________ at very ______________ temperatures, shooting ____________________________ & ____________________________ everywhere. Eventually, the matter began to ____________________ off & formed various ____________________________. Formation of the Universe One Scientific Theory – “__________ _____________ _______________” All _________________________________ & _________________________________ in the universe was concentrated in an __________________________________ __________________________ volume _________________________________________ years ago, the _________________________________________ occurred, propelling matter & energy in all directions universe _________________________________ ________________________________ condensed (clumped) matter __________________________________ Many questions remain about the beginning of the universe Hubble’s Logic • For the galaxies to expand, they must have been ____________________________________ in history. • Hubble concluded that there must be an infinitely _________________________________, infinitely _______________________ starting point that contained all the matter in the universe. – Called a ____________________________________. • An enormous ___________________________________ set things in __________________________. How does Hubble’s logic compare to yours about the car crash scene in the movie? _______________________________________________________ _______________________________________________________ _______________________________________________________ But how did Hubble conclude these things (right or wrong) about our universe? • What did he study? – _____________________________ _____________________________ _____________________________ _____________________________ The Heartbeat of a Star • What are stars made of? • What process is the “heartbeat” of a star? – When this process begins, a star is born, & when this process stops, a star dies… Nuclear Fusion A ____________________ is born when _____________________________ begins in the star’s _______________________ (center) ______ + ______ ______ ___________________________ is a reaction that combines _____ ______________________ nuclei (atom) to form ____________________________ nuclei (atom) The result is the release of a large amount of ____________________________ Nuclear Fusion What are the _____ ________________________________ (outcomes) of nuclear fusion? __________________________________ nuclei (atom) LOTS of _____________________________!