The Big Bang Theory Science’s explanation of how the universe originated.
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Transcript of The Big Bang Theory Science’s explanation of how the universe originated.
![Page 1: The Big Bang Theory Science’s explanation of how the universe originated.](https://reader035.fdocuments.net/reader035/viewer/2022062409/56649ea95503460f94bad237/html5/thumbnails/1.jpg)
The Big Bang Theory
Science’s explanation of how the universe originated
![Page 2: The Big Bang Theory Science’s explanation of how the universe originated.](https://reader035.fdocuments.net/reader035/viewer/2022062409/56649ea95503460f94bad237/html5/thumbnails/2.jpg)
•Large and violent explosion 13.7 billion years ago
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•This created many clouds of gas and dust
•Those clouds accreted to form solar systems and eventually galaxies
•ALL the elements came from this explosion, mostly H and He at first
![Page 4: The Big Bang Theory Science’s explanation of how the universe originated.](https://reader035.fdocuments.net/reader035/viewer/2022062409/56649ea95503460f94bad237/html5/thumbnails/4.jpg)
•heavier elements formed later (inside the stars)
![Page 5: The Big Bang Theory Science’s explanation of how the universe originated.](https://reader035.fdocuments.net/reader035/viewer/2022062409/56649ea95503460f94bad237/html5/thumbnails/5.jpg)
•the universe continues to expand, evolve, and cool
pg.720
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•Quickly look over your notes and then summarize important concepts
60 second summary
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๏how the universe began
Review #1What does the big bang theory try to explain?
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Review #2What does accretion mean?
๏to clump together and stick
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Review #3 Which 2 elements were there the most of after the big bang?
๏H and He
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•evidence: recent data show low-level microwave radiation in the universe, only 3K, background “noise”
•this radiation is left over from the big bang
•as the universe expanded and cooled, the radiation waves stretched out